I thought the unattached system was only in colleges for kids that were red shirting. I think (I am pretty sure)you still enter the one or 2 kids under the High School they are affiliated with.
i dont think so because there were a couple tournoments where our bracate was full and we had to send a second kid at a weight to a jv tournoment. Im sure though for regionals and mabey league you can only have one kid at each weight for each team