Maybe this is a dumb question, but when are these big blinds/100 or pt big bets/100? I see people use these interchangeably (I think) and am not sure if the lowercase "bb" always means one thing, while "BB" always means another.

I'm a micro grinder too and am curious to know for the same reason. Since big blinds are half as much as PokerTracker Big Bets, it might be nice to know.