Thanks Burnt Toast. To update as promised...I passed again this morning using the first void of the day. I cross-checked the same sample using another brand of test and passed that as well.

I agree that subbing is probably the more direct route, however, this is the fourth test I have passed and am pretty sure I am clean (at least at the 50 ng/mL threshold). My concern comes from the fact that the testing center I will be going to also does tests for probationary purposes, so I'm worried that I'm going to get an over zealous test center employee who will want to observe as much as possible. I know they cant watch directly but I've heard of them asking you to keep the door open to the single-toilet bathroom while you test.

Is there any strategy to get the door closed and get more privacy in the event they want to keep the door open, or come into the room with me with their back turned, etc? I'd like to check the temp before I submit if I do sub.