Random number generator does not produce an expected answer Node JS

In a Node JS script, a formula is being used to generate a random number between two values. Here is the function randomIntInc:

function randomIntInc(low, high) {

return Math.floor(Math.random() * (high - low + 1) + low);

}

The function is called with two values as low and high:

let randomNumber = randomIntInc(requestedStart, requestedEnd);

console.log(requestedStart) before executing the above line produces 542 (expected)

console.log(requestedEnd) before executing the above line produces 592 (expected)

Now, running the above line and logging the output produces any value, generally within 6 and 50.

What is happening? Logging before executing the random number shows the correct ranges, but the outputted number just does not fall within the given range.

Here's the full code (related code at 113) (please ignore bad practice code that's unrelated / memes or easter eggs):

// Copyright (C) 2018, Julian Lachniet, Jacob Wysko

// Dependencies
var Discord = require('discord.io'),
    logger = require('winston'),
    auth = require('../auth.json'),
    rn = require('random-number'),
    http = require('http'),
    request = require('request');

// Authorize connection
var bot = new Discord.Client({
    token: auth.token,
    autorun: true
});

// GOOGLE SHEETS API
const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
const SCOPES = ['https://www.googleapis.com/auth/spreadsheets.readonly'];
const TOKEN_PATH = 'credentials.json';

// If bot disconnects, try to reconnect
bot.on('disconnect', function(msg, code) {
    if (code === 0) return console.error(msg);
    bot.connect();
});

// Returns the current timestamp
function timeStamp() {
    return "[" + new Date().toString().split(" G")[0] + "]";
}

// Returns a random integer
function randomIntInc(low, high) {
    return Math.floor(Math.random() * (high - low + 1) + low);
}

// When a message is recieved
bot.on('message', function(user, userID, channelID, message, evt) {
    let valid = false;
    // Log what the user sent (verifies it wasn't sent by the bot)
    if (user !== 'teacher-quotes-bot') {
        console.log(timeStamp() + " " + user + ": " + message);
    }
    // Sends a message with text "message", logs it
    function sendMessage(message) {
        bot.sendMessage({
            to: channelID,
            message: message
        });
        console.log(timeStamp() + " Bot: " + message);
        valid = true;
    }
    // Sends a message based on a list of commands
    function infoMessage(commands, response) {
        if (commands.includes(input)) {
            sendMessage(response);
        }
        validCommands.push(commands);
    }
    // If the message began with a '!' (e.g., !cmd)
    if (message.substring(0, 1) === '!') {
        var args = message.substring(1).split(' ');
        var input = args[0];
        var validCommands = [];
        // Commands
        infoMessage(['accuracy', 'disclaimer', 'terms'], '<#440534402171404289>');
        infoMessage(['android', 'app'], 'https://play.google.com/store/apps/details?id=com.jacobwysko.teacherquotes');
        infoMessage(['format', 'formats', 'formatting'], '"Quote text." - Teacher, MM/DD/YYYY');
        infoMessage(['code', 'git', 'github', 'roadmap', 'trello', 'source', 'sourcecode'], 'https://github.com/wyskoj/TeacherQuotesVersion3\nhttps://github.com/jlachniet/TeacherQuotesBot');
        infoMessage(['faq', 'help', '?'], "You've been <#440504422028804107>ed.");
        infoMessage(['ping', 'pong'], 'Pong!');
        infoMessage(['rule', 'rules'], "You've been <#440500062011916298>ed");
        infoMessage(['apple', 'ios', 'web', 'website'], 'http://jacobwysko.com/teacherquotes');
        infoMessage(['cmd', 'cmds', 'command', 'commands'], 'Valid Commands:\n - accuracy\n - app\n - format\n - github\n - help\n - ping\n - rules\n - website');
        // Easter eggs
        infoMessage(['ivefallenandicantgetup'], 'Stay right there, ' + user + "! Don't worry, help is on the way!");
        infoMessage(['goddammitimpregnant'], '...for the fifteenth damn time!');
        infoMessage(['yeah'], 'ｂｏｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉｉ');
        infoMessage(['ohhi'], 'mark');
        infoMessage(['poopity'], 'scoop');
        switch (input) {
            case 'fact':
            case 'randomfact':
                // Sends a random fact
                request('https://spreadsheets.google.com/feeds/list/1ggvma51cj7ryPqfxGv47ZPLuP72keZmFbGE-KBHqbuU/4/public/values?alt=json', function(error, response, body) {
                    let boi = body;
                    let output = JSON.parse(boi);
                    let options = {
                        min: 0,
                        max: 11,
                        integer: true
                    };
                    let randomNumber = rn(options);
                    sendMessage(output["feed"]["entry"][randomNumber]["gsx$randomfact"]["$t"]);
                });
                break;
            case 'randomquote':
                // Sends a random quote
                if (args.length !== 2) {
                    request('https://spreadsheets.google.com/feeds/list/1ggvma51cj7ryPqfxGv47ZPLuP72keZmFbGE-KBHqbuU/1/public/values?alt=json', function(error, response, body) {
                        let output = JSON.parse(body);
                        let options = {
                            min: 0,
                            max: output["feed"]["entry"].length,
                            integer: true
                        };
                        let randomNumber = rn(options);
                        sendMessage(('"' + output["feed"]["entry"][randomNumber]["gsx$quote"]["$t"] + '" - ' + output["feed"]["entry"][randomNumber]["gsx$teacherquoted"]["$t"] + ", " + output["feed"]["entry"][randomNumber]["gsx$date"]["$t"]))
                    });
                } else {
                    console.log("SPECIFICS TEACHER");
                    let requestedTeacher = args[1];
                    request('https://spreadsheets.google.com/feeds/list/1ggvma51cj7ryPqfxGv47ZPLuP72keZmFbGE-KBHqbuU/1/public/values?alt=json', function (error, response, body) {
                        let quotes = JSON.parse(body);
                        console.log(quotes);
                        request('https://spreadsheets.google.com/feeds/list/1ggvma51cj7ryPqfxGv47ZPLuP72keZmFbGE-KBHqbuU/2/public/values?alt=json', function (error, response, body){
                            let ranges = JSON.parse(body);
                            console.log(ranges);

                            let teachers = [];
                            for (i = 0; i < ranges["feed"]["entry"].length; i++){
                                teachers.push(ranges["feed"]["entry"][i]["gsx$teacher"]["$t"]);
                            }

                            let teacherStart = [];
                            for (i = 0; i < ranges["feed"]["entry"].length; i++){
                                teacherStart.push(ranges["feed"]["entry"][i]["gsx$rangestart"]["$t"]);
                            }

                            let teacherEnd = [];
                            for (i = 0; i < ranges["feed"]["entry"].length; i++){
                                teacherEnd.push(ranges["feed"]["entry"][i]["gsx$rangeend"]["$t"]);
                            }

                            let requestedTeacherId = teachers.indexOf(requestedTeacher);

                            let requestedStart = teacherStart[requestedTeacherId];
                            let requestedEnd = teacherEnd[requestedTeacherId];

                            console.log(requestedStart);
                            console.log(requestedEnd);    
                            let randomNumber = randomIntInc(requestedStart, requestedEnd);

                            console.log(requestedTeacher);
                            console.log(randomNumber);
                        });
                    });


                }
                break;
        }
        if (!valid && !['fact', 'randomfact', 'randomquote'].includes(input)) { 
            sendMessage('Invalid command. Type "!command" for a list of commands.');
        }
    } else
    if (user !== 'teacher-quotes-bot' && channelID === '465330717782441986') {
        let validQuoteRegex = /".+"\s-\s\w+,\s\d{2}\/\d{2}\/\d{4}/;
        if (validQuoteRegex.test(message)) { // If the message sent was a valid quote
            let justMessage = message.split('"')[1];
            let justTeacher = message.split('"')[2].substring(3, message.split('"')[2].length - 12);
            let justDate = message.substring(message.length - 10, message.length);
            if (justTeacher.indexOf("(") > -1) {
                justTeacher = justTeacher.substring(0, justTeacher.indexOf("("));
            }
            sendMessage("Message: " + justMessage + "\nTeacher: " + justTeacher + "\nDate: " + justDate);
        } else {
            sendMessage("Invalid Quote");
        }
    }
});