I really don't recall there being any kind of twist. Some of the bars can develop a twist as that is the direction the force goes in once the wheels start to turn and if the front mount is worn or just the rear bushings are changed that can pull up on the mounts.
What we need from you.
1 well lit picture of the front upper diff mount
1 well lit picture of both diffs from the rear with a ruler for scale
1 well lit picture of the mounting studs on the car for the mustache bar with a square object like a right triangle to show the angle of the studs
1 well lit picture of both bars lying on the bushing with a ruler fir scale to the center mounting point
Something is off in this situation. You are asking people to guess without seeing all the cards. Each picture will eliminate one of the possibilities.
1. Upper diff mount is causing interference
2. diff dimensions are different
3. mustache bar studs/bolts are bent
4. mustache bars are different
Those are the four options and those four pictures will give us our four solutions.