THIS! I was trying to set this up. Basically made a "Buckethead" preset when I wanted 1 snapshot to be a wah and the second snapshot to be pitch whammy all with 1 expression pedal. I used the same premise of setting the mix to 0 on the wah when on the pitch whammy snapshot (I can't figure out how to just shut off the wah and enable the pitch without losing the auto-engagement function of the wah) but when I flipped between snapshots the mix was staying the same. You have to go under the bypass/controller option and set the "mix" to "snapshot" so it saves that setting. Thanks!!!