Hi Cara,
I thought I would post this information - it may be helpful to others seeking information.

I received a call from Enterolab last week regarding my results:
She said that my previous IgA results 115 (ref 70-400) would be considered a "low level normal". Given this, and also given that my fecal Anti-gliadin IgA and Fecal Anti-casein results (9 and 8 respectively) were significantly higher than my Fecal Anti-tissue Transglutaminase IgA (3 Units), that I am probably reacting to both gluten and casein. Typically the "negative" results are all approximately the same. I already knew I had a problem with dairy (although blamed it on lactose) and I was pretty certain about the gluten.
She also mentioned, as you did, that improvement on the GF diet gives me my answer, but she also said there really is enough from my results to back that up. So, after this weekend I will start it again.

Thanks again for the help, and hopefully this information is helpful for someone else seeking answers.