No need to worry then ... the test from the lab used by KDM has been shown to have a low rate of both false positives and false negatives, in published research. It hasn't been duplicated independently, of course, but that's hardly their fault.To me, 'alternative Lyme' is a label for those who claim that the symptoms of a large percentage of those who fulfill the criteria for CFS are really caused by chronic Lyme, and that they have test which show this and treatments for these people, even thought their claims have never been showed to hold up when assessed under blinded conditions.
Additionally, people are routinely treated solely based on the bulls-eye rash ... and even blood drawn from the rash often tests negative for Lyme. Hence I wouldn't place too much faith on "mainstream" tests compared to others. And symptoms + exposure + other lab results seems as good a place to start as any, for patients who are happy to be treated even in the absences of 100% certainty regarding the diagnosis.