TiVo Suggestions In Low Definition

TiVo can drive me batty sometimes. Why? Mainly because it records a Low Definition version of a show that is also being aired in High Definition. How silly is that? Why oh why isn't there a simple option that says Always Record the Hi Def Version of any show you are going to record... suggestions, season pass, whatever.

Also, why doesn't it keep track of which shows it has already recorded? Drives me nuts to find shows we've already seen being recorded somewhere. How hard can that be?

Not sure why these simple things out.