Hello Unicorn Glitter -
Unfortunately there is no way to bulk update categories on your Saved Listings.
The difficulty you have encountered is expected behavior - which is, in part, why there is no tool to update categories in bulk. Please be aware that each category in eBay may have different options or requirements, so the listing creation page in your Auctiva account is dynamic and the available options change as selections are made. So, once you select the eBay site you wish to post to, some of the options on the lister change - this occurs again as soon as a category is selected.
So, if you change the category, the options on the lister page also change based on the requirements and options based on the new category. Currently we are unable to retain that data when the category changes even though the new category may have similar options or requirements, which requires such changes to be made on a case by case basis.
However, I have forwarded your comments along in the form of a feature request to our Product Management team for further investigation into the possibility of retaining the information such as you have described.
- Craig