Hi PomMom,
I don't really know much about the prothrombin mutation, but a low HbA2 usually indicates that one carries alpha thalassemia. However, none of your other red cell indices are low, so I don't think it can be said for sure that you carry alpha thal. If you do, it would have to be a one gene silent carrier status. I would actually suggest having the electrophoresis done again, because there is nothing else that points to alpha thal. If you are a silent carrier, you probably would not see any effects from it.