Welcome to the forum. Thanks for your question.
The news is good: probably you do NOT have HSV-2. The HSV-2 blood tests are not completely reliable, especially when the numerical value is low. Although technically any result of 1.10 or higher is positive, in fact only results of 3.5 or above are reliably positive. Between those numbers, many results are false -- the lower the number, the greater the chance. It is conceivable that you indeed acquired HSV-2 in Guatemala, but probably not, since you haven't had symptoms and the odds of transmission are low for any single exposure.
Those comments reply to question 2. To the others:
1) Don't say anything yet to your wife. Probably you don't have it. But if you still want to start learning more about genital herpes, some good places to start are information provided by the US Centers for Disease Control and Prevention (www.cdc.gov/std), the American Sexual Health Association (www.ashastd.org), or the Westover Heights Clinic of Portland, OR (www.westoverheights.com).
3) Either Biokit or WB would be accurate right now. The only reason for another Labcorp test would be to see if the HSV-2 value has risen substantially, perhaps indicating a new infection. But as I said, that's unlikely. I recommend you go straight to WB.
Here are a couple of other threads that discuss these issues in more detail.
http://www.medhelp.org/posts/show/593272
http://www.medhelp.org/posts/show/1635711
I hope this has helped. Best wishes--- HHH, MD