these are possibles
either the door has DROPPED
the foundations either lifted/dropped
the lock keep could be out of line due to any of the above but might have some adjustment in it
wirecutterman
January 2010
pull handle up as far as it can go then turn key, handle should go up a good bit.
shortycanfixit
January 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix windows and doors.