Granite Grabbers are another mounting system that works well.

Yours will probably work fine if you adjust the dishwasher legs some and lower the dishwasher so the door doesn't hit. I don't know what the purpose for the nut between the two brackets, but looks to be the cause of the problem.

Modern dishwashers are designed to be screwed into cabinet/panel sides. Chisel that ugly awful junk off and use them, please.

If you must, you can retrofit this by bending the tabs 90*.