Why are My collections Repeating?

I am creating a Wix Store. I should only have 215 items in 6 collections. However, right now I have 215 items (which is correct) but in 9 collections. 3 of my collections are repeating twice. With different amount of items in each collection. For example, I have collections ABCDEF. ABC are repeating. So i have ABCDEFABC. The first A will have three items and the second A will have 6 items.
I have been examining my CSV file but there doesn’t seem to be an error. Could there be an error I just haven’t noticed yet.
Also, how would a customer be able to sort the items by collection?
Thank you.