My major concern was if the test cup I ordered was exactly the DOT test which I guess isn't (but it is close).
Why is this such a major concern? You already acknowledge that your cup test and the DOT initial screen utilize a 50 ng limit. A 50 ng test is a 50 ng test regardless of type.

Edit: The cup test that youre referring to is far from the Immunoassay used on the initial DOT screen. All DOT-regulated tests are 5 panel, not 7 panel.
http://www.dot.gov/odapc/NEW_DOCS/subpart_b/40_13.pdf
http://www.dot.gov/odapc/NEW_DOCS/subpart_f/40_85.pdf


With that being pointed out, about the only thing the two tests share is the 50 ng limit.
Burnt Toast Reviewed by Burnt Toast on . DOT drug test Are the DOT test cups you purchase online (the cups with the diff dip sticks attached around the cup) the same thing as the actual DOT urine test? Rating: 5