Shop - item button positions

[Tsaras]

I have an issue with item button positions in a shop. The shop abilities are copied from the Goblin Merchant:

The shop has the items listed in the Items Sold in the order I would like them to appear and all items have 0/0 button positions:

Now, the potions appear not in the spot I would expect them to. Does this have to do with the fact they share a cooldown group? I have tried manually setting button position X/Y for each item but this gave an even more random result.

 

[A]mun]

The only way to sort items in shops i know (other than declaring their x/y position individually), is sorting them like one can with spellbooks.
I.e. adding them via triggers (only works for shops that have the 'sell items' ability mind you) in sequence.