Mushy brakes 4 life...

I'm not even too damn sure you have the correct diameter backing plates at this point. Somehow I missed those photos earlier. "How do you know" what you have, ANY of it? I can see the shoes, you bought them, and the hardware. But the backing plate and drums may be completely unknown??

The way the shoes are cocked seems to me the drum is not going on far enough, not too far. As I said earlier, IF IF it was a simple matter of the drum/ backing plate interferance, you could have the rear edge of the drum taken off in a brake lathe. I don't think that is the "only" issue(s)

Cam you seat the shoes on the backing plate and "see" that they actually fit that much OK?