Hello all.  I'm very happy to say my filter is working perfectly.  What it
looked like before was that I was aliasing input frequencies above Fs/4 the
decimating Nyquist.  After much trial and error I think my problem was that
1.  I didn't account for the filter gain - after filtering - the skirts
then were heavily amplified.  2. I may have not added in correctly the
previous MAC. (time for version control software)

Good luck to all and thanks for your responses !!!