Could anyone provide some insight on this?

I've had negative tests for celiac (biopsy and blood tests), and enterolab results are below:
Fecal Anti-gliadin IgA: 9 Units
Fecal Anti-tissue Transglutaminase IgA: 3 Units
Quantitative Microscopic Fecal Fat Score: Less than 300 Units
Fecal Anti-casein (cow's milk) IgA: 8 Units
HLA-DQB1 Molecular analysis, Allele 1: 0501
HLA-DQB1 Molecular analysis, Allele 2: 0602
Serologic equivalent: HLA-DQ 1,1 (Subtype 5,6)

My symptoms (severe acid reflux (LRPD) resulting in laryngospasm and voice issues, also bloating) seem to be relieved with a GF diet (although I have only made attempts for about 6 weeks at the most at any given time before I give up). I am also lactose intolerant, and have mild asthma.

The main question I have: given that I have 2 copies of the gluten sensitivity gene and also have symptoms that appear to be resolved with a GF diet, why would all of my tests suggest that I do not have any issues? Could it be that I do have an intolerance despite negative fecal results (it seems that I would be a rare case).

Thanks for any insight!