1. When reversing/rolling backwards, the brakes 'catch' sometimes... the pedal depresses by itself a bit and releases. Feels like it notched something and passed over. This only happens going backwards and not very often. Just had the brakes done, shoes/discs and all. What might have been missed?
2. Depressing the brake pedal interferes with AM radio reception. Grounding, or something else perhaps tied with the first question?