I am very happy to say I have finally found the cause of my problem. My car has been running great except every time I would come to a stop in drive, the idle would dip once and then recover quickly, but it drove me nuts. I played with airflow tables, idle timing and coastdown timing to no avail.
This morning I turned off CT downshift in the torque management section and voila.............. perfect.
Just posting up in case anyone else has this issue.