Well now I get two types of API warnings and I can't relist the item. I wrote to support and the answer was to list directly in ebay:
"I reviewed your account carefully and found that this listings were rejected by eBay when we attempted to post them on your behalf and that the following errors was also returned in response:
Select only one category to list with Store Inventory format.
You'll have to remove the second listing category that you selected when you originally posted this item. Auctiva only offers basic revising before relisting functions such as changing your Title, the Quantity, Start price, BIN price, Reserve and Duration.
In order to do so, you'll have to re-list this item directly via eBay.
If you have any additional questions or concerns pertaining to your Auctiva account, please feel free to let me know, and I’ll be happy to continue assisting you."