Welcome Jerry! We don't (can't) delete profiles on WikiTree. You can connect them to the correct parents though. On each child's Edit tab, on the right hand side, there is a link to remove/replace father, and one for the mother as well. Make a note of the WikiTree ID of the correct parent, and drop it into the ID field of the remove/replace parent screen. Then scroll to the very bottom and click the appropriate button to complete the operation.