I have never seen shoes flip up like that unless they were too wide, or the backing plates were in the wrong plane. If the pushrods from the W/Cs are in any position but parallel to the centerline of the car, then you have a mismatch of parts, that has nothing to do with the axles..........yet.
If the shoes flip up by themselves......something is wrong, and they will flip up after the drum is on, and SHAZZAM there is your mushiness.
