I was having a another issue with my MCU and extender. I was getting some sort of MIDI feedback look causing value changes to register in multiples; such as pan would move +3, the play button would return multiple presses per touch, stop would return to beginning on song, ghosting faders on the extender.

The issue seems to revolve around a potential driver issue for multiple M-audio MIDISPORT interfaces. I have a MIDISPORT 2x2, and a MIDISPORT 4X4. The 4x4 is dedicated to the MCU and extender. When both are plugged in, something was causing midi commands to the control surfaces to be looped, even when nothing was plugged into the 2x2. I unplugged the 2x2, and the issue resolved itself.

This was not an issue with Logic 7.