Last month the PSL announced that the window would start and close earlier than usual but club officials and coaches have now demurred the change to the schedule that they say was imposed on them when they least expected it.
Siem told Football365.co.za: "The clubs have no reason to complain. It was a unanimous decision by all the clubs. But I realise that now and then people keep talking without knowing."
According to the outgoing PSL CEO, several meetings between the PSL and clubs took place before the decision was taken.
"Now if a coach wants to start moaning, he needs to do that with his own boss. We can't go on like this. Everybody agreed and you cannot start moaning now. If we had stuck to the January transfer there would only be February left before the end of the season," he said.