FPHG available

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WARNING - DUMB QUESTION

I am a technical moron.

I have seen many posts regarding modifying FPHG and/or PT settings to split observed mined hands from those played in to avoid duplication. Last night I played for about 2 hours with FPHG open. FPHG is in an intertops folder as I play on party. After importing that played session as well as all the mined hands it does not seem like there is any duplication of the hands as I would expect. I thought FPHG would write a hhf that would duplicate the PP hhf on the tables I was playing at and cause problems with my PT stats. Thanks for reading this far. Is ignorance bliss or am I missing something that is going to screw with my stats?