I have noticed that if a game has several GUIs with differently-sized inventory windows AGS doesn't recalculate the positions of inv. items each time the new inventory GUI is displayed. It always uses the values of the inv window which was displayed the first. So game.items_per_line and game.num_inv_displayed are equal for all of the inventory windows.
-Cheers
Yeah, AGS doesn't handle having multiple inventory windows too well. It needs a bit of a rethink really, so that you can specify which character's inventory is displayed in which window, and have settings for them individually.