I've noticed that almost every time I finish a session in a cash game and I sit out with out paying any blinds or antes, yet when I close those tables I always lose about .50, sometimes more.  I have my cashier open purposely for this reason because I want to keep track of it.  Sometimes it doesn't happen but for the most part it does.  And it is always after I have put no money in any pot, blind ante included, yet still they keep taking money from me.  I close all the tables and then where it says in play, there's always around .25 to .50 remaining.   I thought maybe you have to pay the BB when you leave a table, regardless of where you are, but sometimes ti doesn't happen at all.  Is this some kind of scam or what?