One of the benefits of the move to app ordering is that I know for certain the order-taker got it right. And I can bookmark the custom order for later reuse.
Now it's just down to the kitchen to fulfill the order correctly, and while it's not 100% it's a lot, lot better.
And of course whoever set up the menu on the app to have programmed in the appropriate option in the first place.
It's always the kitchen for me across food places (in Australia). Ending up with pickles when I removed them. Ending up with coke zero instead of coke. But the worst is ending up with anything mock meat!