Thank you for playing! Ahh, damn, I know exactly why that bug is happening... that is frustrating.
And yeah, I fiddled with the placement of that UI a lot. I think maybe a better solution would be to maybe have some kind of "ghost image" of what you're holding next to each of the customer's orders, so you could quickly compare them? Or, more radically, have the customers come in from the side rather than the top and rearrange all of the UI. Not sure.
I'm glad you liked it though!