The temperature strip is usually only on the collection cup and not the bottles they send the urine in. Are you sure it was on a bottle, not the cup you pissed in?

Depending on the job, a split sample is not mandatory. A split sample will require the urine to be poured into 2 bottles. The split sample just offers you a chance to have the sample in the second bottle to be tested by another company usually at your cost. Even though many use split sample, it is hard to get anyone to send the B sample off for additional testing. Every one from the employer to the lab puts up blocks.