I WAS WONDERING IF ONE BAD SERVO CAN CAUSE ALL MY SERVOS TO GLITCH

I suppose it could. Im no expert on RC yet, only a year in so far. But I would think any part in the chain of electronics thats shorting, drawing to much power,etc, etc could couse several issues like both of them. Have you ruled out your ESC, motor, RX?

what kind of car is the equipment in? are any of the cables or the antenna touching any carbon fiber parts? are u using a 2.4ghz radio system? i have had problems like this before but i had a 75mhz radio and the car was full carbon fiber which cause a lot of interference with the radio system. the only way i was able to fix this was to go to a 2.4ghz radio system.

Ok I m using spectrum 2.4 I don't have any carbon fiber I live in MD AND HAVE BEEN RUNNING in snow do u think servo got moister in them.

Yes, one servo can affect the whole system. If it has a short circuit in it that could cause the voltage to drop which can affect the receiver. Open up the servos and let em dry out.

Yea, I figured it could

Pull the RX and servo out, clean them with denatured alcohol and let them sit in a zip lock bag full of non cooked white rice for a few hours. The rice will pull all the moisture out quickly.