1998 Oldsmobile Bravada battery charge

My 1998 oldsmobile bracvada seems to have what I belive is a problem with the ignition switch. Recently I've had problems maintaining a full charge on the battery, the battery tests good and so does the alternator. I think that the ignition switch may not be shutting down completeley and it may be leaving some accessories powered up and that may be what is causing the battery drain. I've noticed that sometimes the key is had to insert into the ifgnition switch and I have mess with it to get it in and turn the car on. I've also discovered that I can pull the key out while the engine is running. Please advise if this may be the problem or if there is something else going on.