OK, now I have a new problem.
Mix 1 to Ax 1 to Send 3 works fine
Mix 2 to Ax 2 to Send 4 works fine
Mix 3 to Ax 3 to Send 5 works fine
Mix 4 to Ax 4 to Send 6 works fine
The problem is Mix 2 is also showing up in Send 3, 5 and 6. Mix 1 only goes to Send 3, Mix 3 only goes to Send 5, Mix 4 only goes to Send 6. Why does Mix 2 go to all 4 sends. As far as I can find it is set up the same as Mix 1, 3 and 4.