What you’re seeing is probably a MIDI feedback loop. Many sequencers default to echoing MIDI commands back to the device that sent them. With programs/devices like GearBox that respond instantly to their own controls instead of waiting for a command to echo back from the sequencer/recording program, this means that every command will get acted on at least twice (possibly more when you’re doing something like sweeping through a controller as you would with a wah or volume setting). Look for the setting in your recording program that controls “MIDI echo” and turn it off for the UX1/UX2.