1) Is it safe to say that there is no way that the event in April resulted in the positive HSV results?
You would not have an IgG result of 33 after 8 days of infection. This was a longer standing infection and you could have had this since childhood, which is common. This has nothing to do with the sexual encounter that you had.
2) If my wife had a negative test in mid-March. Why would the number be so high?
Your wife had an IgG test in March for HSV 1 and it was negative? Why was she tested in march for HSV? The IgG test for HSV 1 misses 30% of infections so the test could definitely have missed her infection the first time. It is very very odd that you both have the exact same number on the test results – very odd.
3) Does the IGG number mean anything?
No, except that the infection is not new. It only means that you have a well established HSV 2 infection, as do about 55% of men in your age group
4) Should I be worried about HIV retest?
I don’t see anything about HIV here but your encounter does not represent a risk for HIV
If I am asymptomatic are there a reason to avoid food with high arginine?
Does sun really trigger an outbreak? How much sun?
it varies, but you’ve had this a long time – have you worried about sun in the past triggering a cold sore?
Can I drink coffee twice/three time a week with an issues?
Drink as much as you wish – coffee is not an issue with HSV 1 or HSV 2.