No sane person would mistake "autotune" for "record". People who are not into technology wouldn't know (or care) what autotune was and wouldn't use it. As long as they are not near each other on the menu, or even have a popup that reads "This show will NOT be recorded" or something, there is no excuse to not have this very basic and useful feature.
It's all in the implementation. If you have it set up so you hit a button with those two choices available some will get confused. It's why I say if it's added it should be in the recording manager menus and acceded just like a manual recording. Anything else will cause confusion because so many don't have a clue hat the difference would be. And that's just because they don't know the terms or things like that on a DVR in the first place.
I'll bet half the people over the age of 60 with DVRs don't even record.