I have a similar problem.
I recently redid my entire rear brakes because I had a leaky rear wheel cylinder. I redid shoes, drums, hardware and cylinders. I bled my brakes and topped up the fluid. It stops amazing now.
Problem is...the ebrake light doesnt want to go out. I have no leaks, my front brakes are just fine (recently done), and my switch passes the continuity test (switch closed = light on (beep) and switch open = light off (no beep)...Maybe adjust the ebrake cable?