"I have the closing documents and the mom, and all 3 children's names are on the closing documents."

Well, it certainly wasn't the answer you wanted. Have you explained the dilemma so that they can help you? They should know how, when, if, everyone got/was on the deed. My county records are an open tab on the browser at all times. I can tell you anything you need regarding deeds, for county parcels, and by address, COS, Names. Heck, if I put in a name, I will see every parcel you own.