Well this is really strange but whether I have expression or Velocity X-Fade set to CC11, a text expression set to send CC1 values sends that same value to CC11 as well. In fact if I change CC1 to another value, CC11 matches that value as well.
Very strange. I also confirmed this by exporting a midi file from Finale and importing in my DAW so I could better see the CC1/CC11 values.