I felt that the hand brake on my 2015 GT didn't go up far enough either, but I usually get it up a couple clicks. Haven't experienced any "red warning" though. Not much help, huh?
Yeah it feels like that at all time. Seems there's just a little pressure that makes it go up a little. I just have to give it a push down and light doesn't come on. Definitely same thing you're describing. I have base model. It doesn't bother me so I'm not wasting a trip to the dealer. I try to avoid going to dealers at all cost honestly.