Not really bro, I had my back arched on purpose for my back pose, so that is irrelevant. 11% is damn good if that is what you estimate brotha. I value your opinion, as I have been on this board for quite a while without posting, you know your s**t.
Why is this number so important to so many people? What would be the difference between me saying 15 and saying 5? Is it going to truly be reflective of your body composition? Hell no. Plenty of top bodybuilders can't tell you exactly where they are in body fat at any given time. They don't care. If your goal in all this is aesthetics, the mirror can be your best friend. Or speaking of friends, just ask your friends what they think of your body. If they tell you're way swole, then congrats, mission accomplished. If they call you a fatass, lose some weight.
I'm not really into playing the 'guess by BF%' game, I'll refrain from commenting on your old pic. As said above, if you are happy with how you look, then the number (like weight - unless you have to make weight for sport) is largely irrelevant.
For my own personal satisfaction, 210 lbs in the single digit bf range is something i would be proud of. I just finished a big bulking diet, and to clean things up by dropping under 10% would just be the icing on the cake.