Not sure what I did - buzzing sound and fade is screwy

The fade/balance does not work properly. When I fade to the full front or rear only one speaker stops putting out sound, not both the front or both the rear. When I do balance (IIRC) one of the speakers on the one side and one on the other side go out. And if I do full balance and fade at one time two speakers still output sound. Even if I got the front/rear speakers on one side backwards, I don't understand how this is doing what it's doing. I never played with the balance/fade before I touched anything so I don't know if it was doing this before or not. I didn't make detailed notes about which speakers go out when the fade/balance is in what location because I was kinda pissed that this isn't going to be done this weekend now.
Now my other problem is, I have a buzzing/whining/annoying-as-hell type sound ONLY when the engine is running. I figure this is caused by the power wire running down with some of the speaker wires, but the strange part is only the RF and LR speakers are making the buzzing sound. It's definately too annoying to deal with since the volume of the sound doesn't change with the volume of the music so if I mute the radio or have the volume down low I can hear it.
Does anyone have any ideas for me? I'm pretty annoyed with this since I've done a few installs before and never had any problems like this.



