You're gonna hate to hear this, but I'm thinking you look long on the 27 1/2" dl, too... Maybe it's just the camera angle, but it almost looks like you're anchoring in "thin air" even in that pic. Maybe you're anchoring against your hair back there and I can't tell. I'd still like to see you anchor somewhere more up against your jawbone than the side of your head behind your ear if that's the case.

It also looks like your cocking your head back to get behind the string to see through your peep... Stand in front of a mirror and work on standing exactly straight up and down with your weight centered on both shoulders and your head centered on your neck. If I drewa line from your belly button up, I think you'd see that your neck is almost all behind it. Sometimes that's a function of too long a draw, and sometimes it's just a bad habit people fall into. I know I have to conciously feel like I'm leaning forward to actually stand up straight when I'm at full draw; I'm spending more and more time in front of a mirror myself practicing, because I have a tendency to lean back. My draw length doesn't change, just the angle of my upper body... but once I get to where standing straight up and down "feels" right, I know I'll have a more solid base.

So... in a nutshell, I'm not ready to declare your draw length too long merely from you leaning slightly back, though it very well could be indicative of that. I do think the fact that you're anchoring way back behind your ear and not against bone is pretty revealing -- especially with as straight a bow arm as you're exhibiting.