Create two installs of AbanteCart Cart. One will be your development or staging install, and one will be the production install.
Add a bunch of stuff to the develop install; categories, merchants, products, images etc..
Back up that "developer" install and restore it to the other "production" fresh install. This should (and needs to) 100% work allowing you to migrate test on one machine and update to another production install. It doesn't.
No media is backed up at all and should be -- copy/pasting the images directory structure over doesn't work either or rather only partially works.
Categories and Merchant (brand) listings on the page don't update likely due to some template caching issue.
Etc..
This area needs a lot of love.