I am replacing interior french doors with custom two panel french doors made from knotty alder. The wall the doors are going to be installed into was not plum, my 6 foot level was out from the wall more then an inch so I tore out the wall and corrected that problem now the wall is level and straight. I have installed the door frame and it is level and plum but when I put the doors onto the hinges and close the door the top has a nice straight line across the top with a even gap but the bottom of the doors are misaligned. it looks like one of the doors is not shut completely or is over shut. what could be causing this problem? Thanks