This answers all of your HIV questions, and if you can think of any more just reread about the 3. You had zero risk therefore testing is irrelevant to your situation because you had zero risk. HIV is a fragile virus, which is instantly inactivated in air and also in saliva which means it is effectively dead so it can't infect from touching, external rubbing or oral activities. It doesn't matter if you and they were actively bleeding or had cuts at the time either because the HIV is effectively dead.
Only 3 adult risks are the following:
1. unprotected penetrating vaginal with a penis
2. unprotected penetrating anal sex with a penis
3. sharing needles that you inject with.
The only way to get HIV is if you did one of the 3. The situation you describe is a long way from any of these 3.
Even with blood, lactation, cuts, rashes, burns, etc the air or the saliva does not allow inactivated virus to infect from touching, external rubbing or oral activities. Doctors have calculated the risk from what you describe to be less than that of being hit by a meteor, therefore no one will get HIV from what you did in the next 40 years of your life either. The above HIV science is 40 years old and very well established, so no detail that you can add to your encounter will change it from zero risk.
Your tests were a waste of time since you can't get hiv, so it is purposeless discussing them.
As noted, you did not have a risk for HIV. I understand that your result was concerning, but again, you had no risk. Any result like the one you received requires confirmatory testing, which it sounds like they did, and proves that you are HIV-negative.
I second CurfewX, you had no risk since you did the right thing - Used a condom for anal sex. Oral sex is not a risk.
You recieved a false positive and that was confirmed with a WB test. The 'undetected' RNA NAT also confirmed that you do not have HIV.
You're in the clear. Always use condoms correctly and consistently for vaginal and anal intercourse to stay away from HIV.