Do you actually mixdown your audio in Avid? Do you use consistent settings when re-importing? AE does not modify audio files in any way and simply use whatever is there. so most likely you are messing it up on export/ import on the Avid.
I'm with Mylenium: rethink your workflow.
I'd go Avid for the edit, AE for visual effects only, then Avid for incorporation of effects and final audio mixdown. Avid gives you plenty of export options for final delivery. Incidentally, that's just what I do.
Appreciate the advice. I am using Encoder as my final output render for all my projects (for some odd reason Sorenson is not giving me the right flavor of DVCPRO HD export for the EVS settings we are currently using. Therefore Avid is not my final source of export. In short my workflow is from Avid (quicktime reference) to AE and then Encoder. Just to give some method to the madness. However, I did finally fix the issue and wanted to share just in case anyone else ran in to similar issues. It appears that AE takes your audio mix upon import and normalizes at 0 db. Dropping it down to -6 DB got me back to my original mix. Once again, thanks for trying to help me trouble shoot.