As others have said, any quality bow will work for your draw length. I believe that all (or most) bow makers use the 28" mark as a way to standardize the measurements. Having a 31" draw I've only ever once run into a bow I couldn't full draw, and it was designed for short draws.
If you want to stick to the 50# mark at your draw distance, I'd look for a 46# or 48#. The stacking after the 28" mark will fill in the gap, but every bow is different so mileage may very.