--the IgA figure is for TOTAL IgA, that is well within reference range, and therefore the IgA transglutaminase figure of 3 is low and not an immediate indicator of celiac.

The tranglutaminase IgA is the blood test most closely associated with villous damage of frank celiac, but did they also test you for the IgA and IgG anti-gliadin antibodies (which are measures that are more sensitive, but less specific, and often will show in those with gluten sensitivity that is not, or at least not yet, causing noticeable intestinal damage)?