agreed, when I ordered my steering wheel control loom, I went direct to ICT and they told me that they released an updated one, while some places like Sextons Direct were still selling the old version.
New version should do this:
If you haven't checked already, you could follow sobriens install thread for the F900BT
viewtopic.php?t=19787
As for the interference, I added ground loop isolators and put them behind the A/C controls along with the line level boosters
If you have the Bose setup, you might find that the volume is a bit reduced, thus needing line boosters (which will also boost the interference)