I don't think welding up the thin sheetmetal that is required to shave the door handles would warp them that bad. I have shaved several sets and
NEVER had any to warp like that.
I am thinking you have a set of the infamous and ill-fitting Goodmark doors. I had seriously considered Goodmark doors until talking with some of the members here who have used them in the past ... they could NOT make them fit ... others said they had No Problems with their's. I instead opted to continue to search for repairable used doors.
If you find a fix for them, please let us know ... I am sure there are others here who have had the same troubles.