Ray:
Without seeing or knowing what type of rafter to post connection you made it hard to say what happened.
You should do, if you didn't, a frame fit up, at the shop or site, first before the frame is raised.
This frame fit up should have been done on the ground or on horses so that you can inspect and measure the frame to insure it is the right size, square and true.
At the frame fit up this gap should have showed up and then you can identify the problem and figure the best solution to it.
Hope this helps....
Jim Rogers
