Hey Kelly.
If the seller took the listing down and you were still listed as a seller of that listing, the listing would still exist with just you as the seller. If the listing is gone, it very well could have been AZ to take it down. If you can, give it a couple of days to have the AZ system updated, and do a search by UPC code (if you have it) and see if it's there. Even if the seller deletes the item, it will stay in the AZ catalogue (supposed to anyway) and can be found via the UPC code.
Hope that helps. All else fails, relist it using a different UPC code. If you then send it to AFN, be sure to sticker it. | 
