Been Taking Clonazepan For Years Now .I Started A Methadone

been taking clonazepan for years now .I started a methadone clinic to kick all my bad habits .they are saying my Clonazepan has not showed up in test Since feb. I said what you want to do take it in front of you they say yer so I took 1 in front of them yesterday .and today I asked the pharmacist would it be in my system if I took pee test he said yes and they gave me the results cup instead of sending it to the lab like they always do and it showed that I took it.SOOOOOO MADDDDDDD It makes me look like a lierv I took 1 pill last night too.