rand() repeating values despite only one srand() call

I have a function that generates x (parameter) random numbers, removes repeats, and returns the values stored in an array.

I am using rand() to call random numbers, however if I call the function with x parameter set to 5 it turns into an infinite loop as rand() continuously returns me the same 4 or 5 numbers.

I have only called srand() once in the main().

int main(void){
    srand(time(NULL));

    erase = eraser(4);
}

int* eraser(int array_size)
{
    array_size++;
    int* remove_ids = malloc(sizeof(int*) * array_size);
    int t, v;
    int i;

    for(i = 0; i < array_size; i++)    {
        t = 1+(rand() & 80);
        v = 1+(rand() & 80);

        printf("t=%d , v=%d\n", t, v);
        remove_ids[i] = t;

        if(i == 0){
            remove_ids[i] = array_size;
        }
        else {
            for(int c = 1; c < i; c++) {
                if(remove_ids[c] == t) {
                    i--;
                    break;
                }
            }
        }
    }

    return(remove_ids);
}

Output:

t=1 , v=1
t=81 , v=1
t=81 , v=65
t=65 , v=17
t=17 , v=65
t=17 , v=65
t=1 , v=65

If I call eraser(5) I get stuck in an infinite loop.

Interestingly, on another function in the program rand() functions perfectly.