3rd party collector will just mean the drug tech that took your sample.
I would say everything looks pretty good if you were able to piss a few times before you went to take the UA.
They should do the immunoassay first and if they show a level above 50ng then they'll do the GC/MS test. But if they haven't called yet you should be good. They wouldn't have failed you if you couldn't piss after 40 ounces of fluid. They would make you stay there for 3 hours and then if you hadn't pissed by then they reschedule you.