Those two results are virtually the same.
Other things can cause urethritis than the traditional stuff like gonorrhea and chlamydia, so good that you were treated.
If it has been that long since you had sex with anyone else, then if your partner recently tests negative for HSV 2, it is fine to do the western blot now.
Our clinic can order the western blot for you at a Quest lab near you.
If your western blot is negative, then we don’t know what exactly causes a false positive but it is likely a cellular protein that you just have that looks similar to the HSV 2 antibody.