As you saw all of these issues with your urine sample before it was sent off, what did your probation officer say when you brought these issues to her attention?

It's only a "scare tactic" if you have been drinking. If not, you have nothing to worry about. Realistically speaking, your sample is not going to get contaminated. If you think other people are hovering over jars of urine, waiting to open the jars and add their own pee... I don't think so.