Snydeman
Synder in swedish means sins... Back to Snyder.
Funny enough, that is my last name. Don't hold it against me.
I am EVIL yaknow.
But, it is from my German side, which if I'm not mistaken means Tailor. The other side is Lockhart which seems to have Irish/Scottish
and Germanic origins in meaning.
As for Snyder on the series, I think his name is actually a play on the word Snide, which fits his personality.
Back to Snyder.
Yeah, He knew about the Hellmouth. He knew about vampires (PCP? C'mon. He's not that dumb. He's proved that much if nothing else.). He knew the authorities were attempting to keep a lid on things and that he was an active part of it. I also think he knew Buffy's status. And, I'm certain that he knew the mayor was behind it all, and that the mayor wasn't quite what he appeared to be. "Won't that be interesting."
It is for sure that the mayor knew about Buffy, and let her run free to keep the city somewhat manageable for his own ends provided she not interfere with his own agenda.
I think that Snyder's personal issues with Buffy stem from his own past and knowing that a high school student was keeping better control, not him.
I think some of these issues are reflected in Band Candy with his desire is to hang out with Buffy and the gang, when he is reverted to his teenage years, is genuine. I think he sincerely wants to do the right thing and help but is incapable of the physical commitment. Growing up, he seems to have over-compensated for this shortcoming. My suspicions are it is related to something in his teen years and one of the reasons he really doesn't like teenagers.