Well there’s your problem!
You are powering the Bot Board (basic stamp 2) from the VS on the SSC-32. When the servos do some work the stamp is resetting and sending the commands to the SSC-32. This is making a loop.
Try connecting the 9vdc battery to the VL on the Bot Board, then jumper the VS terminal on the Bot Board to the VL on the SSC-32. This assumes you will not be connecting any servos to the Bot Board. This will fix your problem.