Originally Posted by
Dilemma
My thought would be to see if you could have both your reservation, and your son's seperated into seperate PNRs. This would probably help with it. However, if your group needs to have everyone in the same PNR, this may not be an option. Make sure you have all receipts (DL receipts).
NO! DO NOT TRY!!! 
(trust me, DO NOT TRY!)
Anyways, seriously don't try it, we used to always split up large groups but now I guess the new thing is that there's code that allows individual OLCI (where there never was before). Group reservations were ALWAYS a weakness of DLmatic, it'd choke on them all the time. Your group leader would be the best person to consult in a case like this, because they should have a personal liason assigned to them at the group desk.