Pos ELISA and neg wb for HIV on 10/23/12. Neg ELISA on 11/16/12 and neg ELISA on 1/31/13. Was the first ELISA a false pos? Can HSV 2 cause false pos?

Yes. This was likely to have been a false-positive elisa assay. That is exactly why the western blot confirmation is necessary. Almost anything stimulating antibody production from another infection to non-infectious inflammatory conditions can produce biologically false + testing.