I can't find anyone complaining about this issue, but I certainly am (to CMEG).
According to the Das user manual, TIF Day is for market hours only while DAY+ covers market plus extended trading hours (i.e., premarket and after hours). That is both logical and how every broker I've ever used applied TIF. But CMEG applies Das TIF as such: Day for premarket and market, Day+ for after hours. That is illogical and wrong. It means needing a duplicate set of hotkeys depending on when you're trading. (What's more, I don't even think CMEG's description of how their TIF works is correct; I use Day+ during regular market hours all the time...and am almost certain I've had to switch to Day to close out a trade AH...it's almost as if they've got the TIFs backwards).
Anyway, I'm trying to get CMEG to contact Das and fix this problem. Just wanted to let anyone else know who's as frustrated as I.