I'd guess that your suspension seatpost is extended beyond the minimum insertion line. I agree with the others, the bike is too small. I sell that model at my shop, and I will say that if that is a 19.5" frame, and you're 5'9" with a 31.5" pbh inseam, I would expect that size to be closer to a good fit than it is. Are you sure it's not a 17" frame? I'm 5'8" with a 31.5" pbh inseam, and if I were to buy one of those bikes for myself, the 19.5" size in the Coda fits me best. The Coda's do tend to run a bit "small," as do most hybrids, when compared to, say, a mountain bike of the same frame size. I ride a 17" mountain bike frame, but something close to a 19" hybrid would be necessary for me if I were to buy one. For you, based on your pics and assuming your bike is indeed a 19.5," you need the next size up.