Urine Drug Screen Help needed - report attached

[diagnostico]

I beg you for your help with interpreting the attached report for urine drug screening. I am trying to make sense of it all but have a few questions.

Here is some background information:
Pain Physician Clinic
Patient gives sample in Point of Care cup with 12 drug reagent strips.
Here is the cup we use:

http://www.usadrugscreening.com/shopping/pgm-more_information.php?id=15&=SID&gclid=CKTpqZqP0LUCFYtU4AodMAcAVA

sample is sent to laboratory for screening or confirmation

My questions:
1. Why is 80101 billed 17 times on the EOB and not 12 times since there are 12 reagent strips in the cup?
2. Why is 83518 billed 4 times and not 12 times since immunoassay screening was done for all 12 reagent strips?
3. Why was 80299 billed only once?
4. Why was 83925 billed only once?
5. Only one drug came back positive on the POC cup. Is it legal to screen the other drugs?
6. Shouldn't there be only one confirmation test done for the one drug found to be positive at POC?
7. Should every cup be screened and confirmed with POC testing?

I am new to my position with the doctors office and need to understand why each CPT was used the number of times that it was billed. Any help that you could provide would be greatly appreciated.

Please see attached....
Thanks

[QueenAlicia]

Some of the tests you can only bill 1 unit regardless of how many units or test that you run. You need to look up the Medicare/insurance specific guidelines as to some of those codes for that particular state may no longer be active.