The tires not turning is a normal occurrence on a 2 post lift. If brake work needs to be performed disconnect the brake rods to remove the tension, then reload the axles and readjust.
I find it easiest to remove the front rods at the actuating arms, the rear rods at the service and E brake cross shafts.
I fine tune and road test the brakes by using hair pin clips instead of cotters, when all adjustments are correct I then do a final install of the cotter pins