> it's hard for the human brain to validate that the 20 things in my cart are the same as the 20 items in the list

In this age of smart-everything, there's no help for that?

Seems strange.

Further, to make things even less difficulty, I'd think it'd be rather straight-forward to map out the select stores they go to in the extremely small set of markets they serve. Certainly considering this is their profession, no?

They could make an app for that.