Help?????

[67chevy2wd]

I installed two doors different doors on my driverside today and from the lowest body line to the bottom of the door my door sticks out farther than the cab. It increase from matching up at the body line to sticking out about a 1/2" at the bottom of the door. Now if you can understand what I just described here what I am thinking aobut doing to fix this. Cut a line in the cab corner up to the body line and pull the cab corner out the match up with the door. What do you think about this and why would it be like this there is not sign on damage. Could this have happened from cutting out the floor pans and rocker panel.