My X32 is not responding to certain commands for setting fader levels. If I send /auxin/01/mix/fader ,f .2 the fader moves up .2 fine. If I send /auxin/01/mix/fader ,f .5, it goes halfway up. So far so good. However, sending ...,f .3 or ...,f .4, or anything greater than .2 and less than .5, the faders don't move. What did I miss in the documentation that causes this?