Is the transponder not there to facilitate timing and scoring? Are they not supposed to manually score the last lap as a backup (makes transponder location irrelevant).

As to the fuel...the event supps should specify the fuel(s). They have a control sample of said fuel(s) if yours doesn't test the same...your tossed. I don't care what it is (pump gas, race fuel, doctored fuel, etc) it is not the same as the control sample. I had nothing but positive experiances with fuel tests while karting at the national level for a few years.