Weird...I can confirm this happening (in Chrome) in other categories other than Gobots as well.
shmax, to repro, add a second anything to your collection (for example, if you have a Cybertron Leader Optimus Prime, add a second Leader Prime), choose any condition other than sealed for purchased condition, click some accessories to remove them, and click the blue bar. Immediately after doing that, it appears okay...open the blue bar up, and you'll find things as you left them.
However, refresh the category/product page, click the blue bar again and you'll find the accessories you removed now have a checkmark by them - the removed accessories have been added back/not saved.
MIKE
engledogg