Back and Ofset Bets.

[aceporty]

Using Bet Angel for several months and created a automation for scalping. What I need help with is to how to control the amount of unmatched bets in the market.
I fire up to three bets into the market with one ofset tick once matched, I have set a condition of unmatched back bets to be less than 3, what is happening is back bets are being fired in fine, but once any bet is matched it is replaced by a new bet. So I have only ever have 3 back bets waiting to be matched.
My worry is the tick ofset bets, how can I control these, There could be many unmatched tick ofset bets, can any one help.
Thanks in advance