Regardless of the riskiness of the exposure, you were over tested. (Looks like you went on line instead of seeing an STD knowledgeable provider for personal care. Most males with new STD develop tell-tale symptoms, so lack of symptoms itself was highly reassuring. The risks of catching hepatitis was too low to worry about (and HCV isn't even sexually transmitted in heterosexuals). Gonorrhea without symptoms is very rare, ditto for syphilis. And the odds of herpes after any single exposure is low, especially if no symptoms occur.
OK, lecture over. To the specific questions.
1) Yes, for practical purposes you can consider yourself home free. It takes up to 4 months for herpes, but the combination of no symptoms plus negative test at 7 weeks adds up to no risk worth worrying about.
2 and 4) No more testing is necessary.
3) Yes. I agree the initial HSV-2 result was falsely positive (and anyway it was so low it should have been repeated, as you did).
Best wishes--- HHH, MD