One last question, when I got to the lab the tech said the "work order" was for a "split sample" ie. she had me fill the cup all the way up then poured it's contents into two seperate containers to ship to the lab. I'm guessing one for the drug screen and one for the S/G and creatinine tests. Is this correct?
No thats not correct. In split-sample collections, the sample is split into bottle A and Bottle B. Bottle A will be tested (drug check as well as the integrity check) while bottle B is put into storage. If bottle A is confirmed positive for a particular drug(s), and the donor decides to mount a challenge to the result, then Bottle B gets tested.