Thanks a lot again. Tomorrow I will try again with all your tips at the rehearsal room#1 - Mapping Mode none (already set in your screenshot)
#2 - that's part of the setup of a button on the MFC. I sold my MFC and I never used it for external devices, so I can't help there. MFC-Edit is worth the money.
#3 - I don't have an Axe Fx II anymore, but the option is in the Global Midi menu somewhere