I'm not sure. I do know that I was tweaking my store categories this weekend and I changed/added/deleted quite a few with eBay.
Then came to Auctiva and hit the update button.
All of this changes were done over about a half an hour or so...and all took.
If you feel that after waiting 15 minutes and trying again that it's not going thru..
File a help ticket and ask them to jump start you.
My Best,
Donna