I was just wondering if its possible to get positives on some and negatives on others? I have dont three tests before today,they were all 25mlU/ml and all three had lines.(faint but there) Today ive done a test 10mlU/ml and negative result. Im just confused now.... Didnt even get an evap on one i did today. Is it possible for the first 3 to be evaps,but show up in inverted pics?