Printing random numbers to list

My task is to generate random numbers in range from 50 to 80, if generated number is even add it to list of even numbers, if it is odd add it to list of odd numbers. Program should run till both lists are filled with 10 numbers. Duplicates in list are not allowed. This code prints 20 different numbers and it is storing duplicates in list. So I think problem is with count_odd, count_even and checking for duplicates but I can’t find solution to that. Also I have to print all generated numbers and also both lists in the end. Numbers in linked list should be in descending order

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>

typedef struct list numbers;
typedef struct list* Pos;

int PrintRandom();
Pos CreateNew();
int PrintList(Pos);

struct list {
    int number;
    Pos next;
};

int PrintList(Pos P) {
    if (P == NULL)
        printf("Empty list.\n");
    while (P != NULL) {
        printf("%d\n", P->number);
        P = P->next;
    }
    return 0;
}

Pos CreateNew() {
    Pos q = NULL;
    q = (Pos)malloc(sizeof(struct list));
    if (q == NULL) return NULL;
    q->next = NULL;
    return q;
}

int PrintRandom() {
    int x = 0, max = 80, min = 50;
    x = (rand() % (max - min + 1) + min);
    printf("Random number is : %d\n", x);
    
    return x;
}

int main() {
    srand(time(0));
    Pos even, odd, q = NULL;
    even = malloc(sizeof(numbers));
    odd = malloc(sizeof(numbers));
    even->next = odd->next = NULL;
    int count_even = 0, count_odd = 0, j;
    Pos head_p =even, head_n=odd;

    while (count_even < 10 & count_odd < 10) {
        j = PrintRandom();
        if (j % 2 == 0) {
            q = CreateNew();
            if (q == NULL) return -1;
            q->number = j;
            while (even->next != NULL && even->next->number > q->number) {
                even = even->next;
            }
            if (even->number== q->number)
                free(q);
            else
                q->next = even->next;
            even->next = q;
            even =head_p;
            count_even++;
        }
        else {
            q = CreateNew();
            if (q == NULL) return -1;
            q->number = j;
            while (odd->next != NULL && odd->next->number > q->number) {
                odd = odd->next;
            }
            if (odd->number == q->number)
                free(q);
            else
                q->next = odd->next;
            odd->next = q;
            odd = head_n;
            count_odd++;
        }
    }

    printf("Even numbers in list are:\n");
    PrintList(head_p->next);
    printf("Odd numbers in list are:n");
    PrintList(head_n->next);

    return 0;
}