Can be fixed by altering the startcoords to 858 & 338. It is actually Tab.baclpack that is bugging too. Logical with the recent drop up menus.
I looked in the getItemAmount include as well as the getTextatEX in the wrappers file and cant fine anywhere to change coords. Cold you point me in the right direction? trying to fix the tabBackpack bug. breaks every script that uses the backpack lol