hard to tell by the pics, but just make sure these are Maytag, or at least clutch slip style belts, and not a regular auto type regular belt, that alone would cause the burning rubber smell if not the right type......
these belts by design are supposed to slip, the motor is under spring tension, which will tighten as it picks up speed......
what did you mean by the tub rocking?....the whole inner/outter tub unit, or just the inner tub?......while you have the front off, there should be 3 springs that keep the unit centered.......your machine is too new for these things to be worn out or weak at this point...
what you should do is take the belts off and turn the pulley, just to check for lock up or a drag in the tranny.....mainly during wash phase as that was whee the burning smell started.....one direction spins the whole tranny with the tub, the other direction locks the tranny and only the agitator will oscilate....
run a small load with the front off just to see if you can pin point where this burning is comming from....just keep clear of that spinning tranny...use caution