I loaded nearly 250 stamps using Ebidloader earlier today, and now they appear to have loaded twice.
(Actually I deleted them all first, and put in some new subcategories using Ebidloader as a spreadsheet)

The upload said it listed 250 and afterwards I deleted the file. Everything seemed to fine. Now it looks as if I have a series of exact duplicates of the new upload. No, I didn't upload it a second time, the time is an exact duplicate on the listing.

I wonder what went wrong?

And what is the easiest way to get rid of the duplicates?