Try moving your bridge back toward the tail to increase the scale length. Move it about 1/2" , retune and check it. That should show better results, at least it's a starting point.
What Jim said. awhile back I made a cbg that was fretted 628mm but bridged at 648.....took some head scratching until I worked it out.
rick, .20 between 1st fret and strings, the higher the strings makes them act like bending ,your making them longer when you fret them.