renraw,

Sounds like  the results were inconclusive and you are being called back to take another polygraph. An INC is considered by the polygraph community to be an error on the examiner's part. Your situation isn't the same as a retest after a polygraph failure, which as you alluded, virtually no one passes. As I'm sure you're aware from reading this site, just because you tell the truth does not mean the polygraph will prove you truthful. The so-called testing procedure just doesn't work that way. Good luck with your follow-up. You may want to download TLBTLD available free on this site, so that you are INFORMED before submitting to this procedure. A reported 50% of the people who take the FBI polygraph fail it. You may find the stakes to be too high to be worth the gamble.  I don't know what the odds of passing are after an INC? Perhaps, someone with more knowledge about this could post some info.?