Further Honda CR-V brake problems?

All four wheels off the ground, have one person apply the brakes while another tries to move each wheel. If the proportioning valve has shuttled to one side you will have unbalanced braking. This will become evident with this test. If you are only replacing the rear brakes and the fronts are fine with little or no wear this might be part of your problem. A pressure Gauge put at each wheel will tell if the same pressure is being applied. Pistons binding in the bore and bad square cut seals or improperly installed bore seals can also cause this problem. Caliper slides that are binding will cause irregular wear, usually to one pad more than both. Improper brake pad application can also cause this problem. Hope this is of some help.