

If you want to remove a connection you will first have to connect the wrongly connected profile to the tree in another way. When that is done you can disconnect the wrong connection.
For wrong parents you can try to see in the child has the correct parents in the drop-down list on its relation tab. If so just choose the right parents there and the incorrect ones will be disconnected automatically.
If the right parents are not available go to tree view and move the child to a correct parent and specify that is the parent. If necessary also move it to the other correct parent and specify that is also a parent. If the child now has too many parents go to profile view and on the relation tab disconnect the wrong parents.
If you still have problems post in https://www.geni.com/discussions/257430?latest=1 and ask for help there (give a link to the problem profile there)