Brake/Rotor Wear

[MooseSuite]

My MS has about 5,000 miles of travel. Yesterday while backing into a site my wife noticed that a grinding sound was coming our of the back driver side wheels.
So once parked, checked the rotors and noticed severe wear on the both driver side rotors. Also brake fluid, down, added 500 ml as I found the bleed assembly broken on the back caliper. Made a temporary fix on the leak. The fluid level is holding.
The curb side rotors are showing minimal wear.
So I am 1000 miles away from our dealer.
I am no expert on brakes, just had the unit in 3 months ago for the one year warranty inspection and nothing noted on brake wear.

Any experts with technical advice, till I can get back to the dealer.