The all button doesn't just remove everything. What it does is max out the numbers on the item...so if you had 15 vesnali antlephore plushies in your shop, it will mark 15 of those to be removed. You still have to go to the bottom and tell it where you want it moved.

Are you on mobile? Some people have been reporting a problem with that. If not, what browser are you using and do you have any addons?