You guys are most probably right,it is still mining at full hash rate 59 Mhsh instead of 61 because I keep the memory clock to plus 950 and not 1200 because it is a MSI brand and if I go higher than this incorrect shares start to come along,so yes it was most probably a false positive,damn I was scared I thought what the heck was happening to my FHR card turning into a nightmare LHR one.