I'm a newb....just got my JTV 69 this week, so I hope this is just a stupid mistake on my part; I'm unable to access guitar models on positions 2 and 4 of my 5-way selector switch! I know according to the manual I should be able to access them on all positions. I'm able to assign models to those positions in work bench but on the guitar, when I switch to those positions, I still hear model 1 on 2, and model 3 on 4. Anybody have a clue what this is all about?