the mro poured the piss into two containers (split specimen?) in the remarks under the temp I could swear he wrote a D as for dilute but other people I show say no its not.
Correction. Its the collector who split the sample and sent it off, not the MRO. The Medical Review Officers job is to report the results.

Split-specimens are mandatory under DOT regulations.

The collector cannot write 'diluted' remarks on the CCF because, as per DOT regulations, all dilution/drug tests are conducted at the lab the sample is sent to - not at the site of collection.