Geez, what kind of Lyme test is that? It's not a C6, It's not a Western Blot. Is it an ELISA? The cutoffs are different than I normally see.
So, the theory is if you contract Bb, and you test positive, you potentially MAY test positive for the rest of your life. But, if your body resolves the infection, or you are successfully treated, your Bb titers are supposed to decline, if only a little, even though you still test positive - this according to what I have been able to deduce over the years. But I'm no doctor, so who knows?
Variable responses can be due to any number of things. Like different laboratories, different technicians, the state of your immune system, etc etc.
There is a school of thought in Lyme world that suggests provoking a response. The patient has to be prescribed abx by a doctor. The patient gets a baseline conventional ELISA or C6 and a Western Blot. By baseline, the theory means no abx for at least 30 days before labs. The patient gets tested. Then he/she goes on abx for a doctor-prescribed period. They stop abx ten days to 14 days before the next blood draw. They have labs done. If no change or it goes down, cool. If Bb levels go up, it - in theory - is suggestive of an active Bb infection. The logic appears to be that the abx kill enough of the spirochetes that debris enters the body and induces an immune response peculiar to Lyme, ie, more Bb-specific antibodies. This also is THEORY.