I am a novice, but I will take a stab at it.

open the device, then go into "Characterize a device."

on mine there is a page(went through a few pages first) with this list
- Two numbers (for example, for channel 2, I press '0' then '2').
- Three numbers (for example, for channel 2, I press '0' '0' '2').
- Number(s) and then enter (or select) (for example, for channel 2, I press '2' then 'Enter')
- Number(s) only (for example, for channel 2, I press '2'; for channel 9456, I press '9' '4' '5' '6').

mabe yours is not setup correctly


Under your activity pick options there is one called "Smart Channel Changes" I have not tried it, but it might take care of it.