Hi Bob, I had the same problem with the drain pipe shearing. I tried to align and fasten the bracket, too. Didn't work either. Right now I guide the assembly in and out manually while my wife actuates the slide switch. It's not to big a hassle to do it this way.
I've noticed that the bottom of the flexible hose track is loose, where it fastens to the floor. This also allows the track to rotate left to right.
When it gets a bit warmer, I'll work on tightening the track bottom attachment and tweak the bracket alignment and keep you posted.
Thanks, Dave