I recently tested positive for oxycodone while using synthetic urine. This had happened one other time, and was sent to the lab for confirmation, which came back as a "false positive". Because of this prior experience, I requested it to be re-tested, which resulted in a confirmed "positive" test for oxycodone, this time. I don't understand how this happened, and as a result of my request to re-test, and because it came back positive I am being accused of "two" positive u.a.'s. How could this happen? I test 3 x a week and none of the tests before or after this one came back positive, I was told it was a very small amount, but, nonetheless, it was positive.