Were all the tests IgG tests?
It's hard to say, really. The hsv1 IgG tests miss 30% of infections, but there are also false positives on the tests, so really, it's just hard to be able to pinpoint it.
The best way to clear it up is a Western Blot test. If she can get a doctor to order it, her insurance might cover it (if you live in the US and insurance is a concern). If not, you can go through Terri Warren. She's a leading herpes expert who offers the test on her website - https://westoverheights.com/getting-a-herpes-western-blot/
She'll have to self-pay, though, and it's expensive - all told, several hundred dollars.
It would be more likely to be a false negative for hsv1, and a false positive for hsv2. Clear as mud, right?
I wish this was easier.