Hello,
I use the amt_bb column in some custom stat calculation (in deed, for debugging, the stat formula is "amt_bb"). Its value is 1.0 In a 2NL (big blind=0.02) where, correct me if I'm wrong, it should be 0.02.
the amt_bb is also used to compute the "StdDev(BB/100)" which, then, may be wrong.
Regards,