I just changed the bushings on my A arms with elephant racing rubber. one part of the installation is to twist these brackets to a certain angle to the arm. easy to do at the time you press them in as they are still lubricated, but once dry they do not want to move. it appears the idea is to preset the static angle to be the normal resting location. then the twisting during driving is only +/- that. you may have not set that correctly when you replaced and then there was constant twist and that would get worse under driving conditions. just a guess.
note the protractor in the pic.
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Bob Cox
78 930 clone project car.
87 924S resurrect at some point.
84 928S, Ruby Red linen/brown interior - sold
86 944 turbo my new DE/track car - sold