Okay so first -
You have the right idea about IgM vs IgG antibodies. Yes, if this were a new infection, your IgM antibodies would be elevated. The problem with the herpes IgM test is that it's just unreliable. Some experts say it's wrong at least 80% of the time, and there's no way to know it. My own IgM tests were negative when it should have positive, and positive when it should have been negative.
There is just something with the test, not your body, that makes it unreliable for herpes. It can react to recurrences, it doesn't differentiate between type 1 and 2, and it's wrong in other situations, too.
So yes, ignore it.
You definitely have a pre-existing HSV1 infection. Your numbers wouldn't be that high this soon if that were a new infection. You already knew that, of course.
A 1.62 on the hsv2 IgG has about a 85% chance of being a false positive. The IgG test looks for hsv2 antibodies by looking for things in the blood that have certain molecular weights, and it can sometimes pick things up that have similar weights, like normal blood proteins.
I know the CDC says below a 3, and I'm not sure why they say 3 now, because it's a 3.5. Terri Warren, a clinician and leading herpes expert, who offers the Western Blot, has seen people with IgGs in the teens have false positives.
So you definitely have hope - quite a bit, actually. You can't do anything until week 12, as no one will do the Western Blot until then for greatest accuracy. At week 12, do another IgG, see what it says. If it stays the same as it is now, it's probably a false positive. You'd be fine accepting that as is, or if you need definitive negative answers, you can get the Western Blot.