Congratulations on your first gig!
The first equal problem we have is the one with transposing the control of the vocalizer from the keyboard while the midi file is playing. Although the keyboard follows the global transponse, the vocalizer sings in the original key. We have to ask Ketron to fix that.
The second thing, when you have to shift the vocal midi track to fix the pitch, is kind of weird, but it then works correctly.
As for the other problems with controlling the vocalizer from the midi track I could only suggest, that you check the controllers in the file that could cause the vocalizer to act when it shouldn't. It works fine on my SD1.
Luka