Welcome to the forum. Your question has many parallels with another thread over the past couple of days. My replies to your specific questions will be succinct, rather than repeating much of what was said there:
http://www.medhelp.org/posts/STDs/HSV-diagnostics-pitfall/show/1896434
Your test results are atypical, and considered in a vacuum -- i.e. without considering exposure, symptoms, etc -- come to a substantial likelihood, but not proof, that you have HSV-2, probably acquired recently, i.e. that you are seroconverting. If so, still another round of testing, including another Western blot, should show a definitely positive HSV-2 result. It is true that people with HSV-1 antibody have higher rates of false positive HSV-2 results, but that usually results in lower ("gray zone") ELISA ratio values, and WB usually still gives clear results.
But when we factor in your sexual history, my judgment is more like 50:50 that you really have HSV-2. I suppose it is possible your most recent partner had a false negative HSV-2 serology. Still, most people with new infections develop at least some symptoms, however mild or atypical -- and people who are particularly anxious about having acquired herpes (as the tone of your question suggests you were) probably are especially likely to notice mild symptoms. Thus, your apparent lack of symptoms argues (softly) against a new HSV infection.
Unfortunately, I have no easy answers for working this out. Most important, if you are not under the care of an infectious diseases specialist or other physician with particular expertise in herpes infections, I would advise you to seek such care and follow that person's advice. A couple of options might be to seek still other blood testing, including the experimental assay being worked on by researchers in Illinois; or PCR testing, but that can be tedious and very expensive, and I'm not sure it's worth the trouble and cost (insurance would probably consider both of these as research procedures and not pay for them). See the other thread for more information about these options.
Sorry I can't give you a clearer answer, but I hope these comments are helpful.
HHH, MD