I ordered from a local bagel shop and also got missing items multiple times.

I finally went in and spoke to a manager who said: "Yeah, you order via Seamless/Grubhub, it shows up on a screen and then someone hand writes down your order."

This conversation happened a few weeks ago. It blew my mind that they didn't have a printer etc for this kind of thing.

Goes to show that the "future is here, just not evenly distributed" is 100% true.