If I had a positive IgG herpes blood test but never had Symptoms Why would the doctor tell me it is probably a false positive? Did he cross reference?

It depends... This depends on details you don't mention. If definitely positive (e.g., if you had a HerpeSelect IgG test and the HSV2 value is 3.5 or higher), it's not false positive: you are infected with HSV2. Lower numbers can be false positive, however. For HSV1, false positive are very rare; if positive, you're infected.

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Chances of having a false positive herpes type 1 blood test? 9.1 igg. While other STDs remain negative 0.0 igg. Had my test 2 weeks later after exposure.

Prob. True Positive. Herpes type 1 is the herpes virus commonly associated with the mouth (cold sores). It can be positive without any other tests being positive. Many people are + for hsv 1 by the time they enter school, picking up the virus from family members. Hsv symptoms may take 2-14 days after exposure to show up and longer for a positive test. You may need to be retested to be sure. Read more...
True positive, but. As pointed out, many adults are positive for Herpes simplex type 1 by adolescence. New IgG antibodies usually ae being produced by day 10 after exposure, may not be detectable until 3 weeks, occasionally later. Particularly diseases such as syphilis and HIV may not be positive at 2 weeks. You should be retested at 4 weeks.HIV. Read more...