collinfeight:
What I mean by "messes up" is that the previously working servo is no longer able to be controlled by the RC remote.
You still haven't said how you are powering the servos. And does "is no longer able to be controlled" mean that the servo never moves or it moves back and forward continually or it moves when the controller changes but not as expected. It's really hard work trying to help when you won't give any real details.
Steve