I agree that the import function is wonky, not all images import and the formatting is incorrect.I don't care for the Bonanza import function. When I used it last, I wanted to import all my listings from ebay once, and did not choose to sync my ebay account with Bonz. When the listings were imported, only one or two pictures were imported. I ended up having to upload the rest of the photos manually. Also the descriptions weren't formatted correctly. Bonz doesn't have a condition description box so you have to make sure you add that information to the description. Anyway, after I did all this work to correct the descriptions and add the missing pictures, the listings disappeared from Bonz when they expired on ebay, even though it wasn't supposed to be synced. Ever since then, I've been creating each listing manually on each site.
I suggested it as a way to store the listings for future copying and pasting.
In my experience, although there's an occasional glitch that changes some formatting, once they're imported, there's no link to ebay and they shouldn't be disappearing from Bonz just because the ebay listing expired. That's a strange one!