I just found this in one of the threads here in MG: "Modulating antibodies are thought to reduce acetylcholine receptors on muscle cells. They are detected in 90% of myasthenics, even when the binding antibodies are negative. But caution must always be used in making a clinical diagnosis based on a test, as the modulating antibody can be falsely positive in people who have recently taken muscle relaxants."

I do take Soma regularly, which is a muscle relaxer. My blood work was done at the same time of day. I wonder is this caused a false positive and the modulating to be >64%. I'm going to guess "Yes". urgh, back to the beginning.