This is for the curbside check in people at the east economy lot. First of all, I don't appreciate being there 95 minutes before my flight, having to wait 6 or 7 minutes for the people in front of me to get done, then get turned away because I'm 88 minutes from my flight. The guy running the show, who isn't very nice, says his computer won't let him do it. I think it's an excuse to be lazy. If it really is the computer thing, they should really build in a grace period. 5 minutes is fine.
The curbside check in thing is a great service, but they are really turning into luggage nazis.
Bottom line: make sure you are there 100 minutes or more before your flight or else you'll be pissed off and stressed out like I was.