Difficulty creating a procedure for a GUI

I think all of the required items should be under one [If] and not "If item, do item, if item, do item" as i think it does not understand that all of the items are required.

Try to have all of the required items within one if block, so if [and, and, and, and] (as many as needed).

So basicly, stack a bunch of "And" on eachother.

I think that is the solution but i am not sure, try it instead.

The GUI procedure is using the player's position for XYZ, not the block's
The way I solved this is setting NBT data on the player for the XYZ position of the block they are interacting with before popping the GUI