Why do only 1 (or 4, 5, ect.) of the triggers do anything when I assign them to BTS Mode?
Most likely this is because you have a assigned a KIT Riff to the Preset, and not a BTS Riff. Go to the Audition Selection page of the Preset Edit menus, and select a BTS Riff instead. KIT Riffs typically only have 4 or 5 separate sequences that play via the trigger buttons when they’re assigned to control BTS.