It could be as simple as a misread, or a wrong label, or as you are thinking, 2 drugs
interacting causing another formulation to be detected
. I really think you will win this thing, just hope the fact they might take away your livelihood in the interim, doesn't break you, both financially and the stress of it. Stress is THE worst thing for me! There are people out there who LOVE to cause other people problems, and I will NEVER understand it!