Plastic bits in wash after clutch replacement

Hi there! My 8 year old direct drive washing machine was making a screeching sound spinning in one direction. I ordered a new clutch assembly and successfully replaced it. Upon reassembly the tub ring is slightly interfering with the balance ring and will carve a groove out of the balance ring if I don’t do something. I tightened everything properly (I thought).

The problem is identical to the problem referenced HERE

And shown in images/videos HERE

One thought I had is to simply shave down the tub ring slightly to prevent interference, but it would be great to know why this misalignment might happen. Thank you!