Individual contributors post the information found on WikiTree, and are responsible for it's veracity. If you have information to add, you can contact a contributor directly from a link on the profile page in question, and share the information that you feel is in error.
You can also request to join WikiTree yourself, collaborate and connect with new cousins. Just send a request to info (at) wikitree (dot) com.
~tami, WikiTree Cousin Connetor & Community Assistant