Ok, thanks for the details Harry.
It appears that the close limit is overshooting on the situation and therefore putting too much pressure on the door itself which do many things to the alignment.
I do not have the actual Model of your opener, but let me give you the details of what to do and if problems finding the adjustment, then post back the Model and I can get the exact location on your unit.
Look on the opener, and you will find 2 screws which are labeled LIMIT.
And 2 screws labeled Force.
You only want the LIMIT at this time, CLOSE LIMIT to be exact.
Using a screwdriver, turn the screw ONLY a screwdriver blade width Counter Clockwise
Then try the door.
If more is needed, turn ONLY one more screwdriver width CCW and try the door again.
The reason for such small increments is because it is very easy to overshoot and have to go back the other direction.
Making only a screwdriver width increment, it may take several times, but you will be exactly where you want the door when finished without overshoot.
Make the adjustments, but do not go over 1/4 turn total on that screw.
There may be other issues involved, if the first few adjustments do not rectify the problem.
Keep me posted,