Looks like if you leave it in auto it only uses 13-20. Somebody mentioned something about it having to be set as US (your location) to be able to select custom, I se eth custom setting but here in UK I can't select it, I do however see all 32 channels and from 22 up are all dead without any...
Somebody mentioned about having to set your location as US, I've done that in my profile but I still don't get the option for manual selection, am I changing the wrong location setting?
***EDIT***
Found it in another thread