I am not grace (shes better looking than I) but let me explain
the scale.
The numbers at that level are just
how sure
the test is. Going off what grace said and what little I know from reading the forums (grace will and does correct me if I am off) the level you are at is above the typical false positive range.
The number can and will change from test to to test. Its not a measure of how much anitbody is int he blood its just how the test confirms it is a good result.