These are clientY/X below. They're just the mouse coords, I don't have any context of where that is in relation to the bounds of the viewport
That's a good question.. The script wasn't working and I just jumped back onto it, so from memory it was just part of testing. It shouldn't be in there. It's gone now 
I think it was there for any devices on the very bottom of the screen so that the operator could actually see at least some of the popup.. I think I still need it in there for now