If you're negative, it doesn't matter what the index value is. It only matters when you're positive as it could be a false positive.
The hsv1 IgG misses 30% of infections, and the hsv2 IgG misses 8%, so it's possible that you have genital hsv1 and the blood test missed that, or hsv2, and the blood test missed that.
It's also possible that what you had wasn't herpes. Can you call the clinic and see if they have your results from 12 years ago? They may not, but it won't hurt to call and ask.
You can perhaps get a Western Blot test through Terri Warren at https://westoverheights.com/getting-a-herpes-western-blot/
She has worked with some people in Canada. Also, depending on how close you are to the border, it may make it easier. Talk to Terri about it.