Our team had a similar problem last season. At first, we though it was an electrical problem and we tried various methods such as calibrating our Talons several times. We finally determined the problem was with the joystick (Logitech X30 Flight Stick) and it was off-center slightly when no one was touching it. This issue made it to look as if some of the speed controllers were lagging. We tried to recalibrate the joystick through Windows but it didn't seem to help. We got another joystick of the same model and seemed to work fine for several months but recently it's giving us the same issue.
I would suggest for you to look to see if all the axis are at the same values in Driver Station. Even a minor difference will produce drastic incorrect movement. If the values aren't equal, try calibrating the joystick (through Devices and Printers in Windows) or you could try completely opening the joystick and centering it again. Another alternative would be to try
QDriverStation which allows using the keyboard as input. If you absolutely have to get another joystick, I'd recommend going for a 360 controller or going for a higher-priced joystick.