Hi Nick,
Welcome to the forums.
Mine did drop in one corner--but not nearly 2 inches.
I removed the screws and slide the unit out.
Then I drove the shelf up into place after putting glue in place.
Finally I added some screws to reinforce the shelf.
I waited 24 hours, then reassembled the unit.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.