Lists numbering Error

So, I've been editing this one list and since November of 2023, The Numbers have been very wonky, On page 1 of this list it shows number 1 three times, on another page numbers 2515, and then 2516 - 2519 is missing but the movies are still there, on the last page it has numbers I haven't even gotten to yet. What is this Error and how Do I fix it?