My team plays in an eight team division so our playoff games are played to seventeen with a half-time at nine. At the beggining of our playoff game our oponents pulled to us. They also scored the half-time point. After the half-time was over we were told that now we have to pull to them (i.e. new half so possesion / pulling roles are reversed). Is this an actual rule? We had no way of checking so we went along with it, but I would like to know whether we played it right.