I bled my brakes today for maintenance, and everything went fine. No seized bleeders and no air in the system. However after a quick test drive and back, i noticed that both FRONT bleeders were leaking from the THREADS. Yes they are tight. Is this normal after opening the bleeders, and will stop in a few days? It a very slow leak, and does not change the level in the master. Also the brakes stop great. Any help is appreciated. thanks