Is this a lab error for hepatitis b?: hbsag(-), hbsae(+), antihbc(+), antihbc igm(-), antihbc igg(-), antihbs(-). repeated 3 more times with all (-)

False positive tests: With negative results on three more tests, almost certainly the positive results were false. This isn't necessarily a lab error, just a glitch in the biology of the test. That is, there probably is nothing the lab could have done to either cause or prevent it. In any case, you don't have hepatitis B. If potentially at risk, e.g. sexually active and not monogamous, get vaccinated.