Well, as I alluded to above, the breath controller has nothing to do with MG2, once you are working in Logic. They are two different sources of MIDI data. If you want to control sax expression, go to dynamic controller mode (again), and depending on what CC you are using for your TEControl breath sensor, put that in there. Most likely it is CC2 (Breath standard) or CC11 (Expression). If you have a bite sensor activated it might control vibrato. The better alternative is to turn that of (deactivate) and use your guitar bends for vibrato action instead. Don’t forget BEND range 2 (enabled on your MIDI Guitar 2 software for that!