On the profile page of Benjamin Creed - left side under the details there is a line like this:
Profile manager: Robert Murray [send private message]
Click on the [send private message] link that is there and you can email directly the person who entered that data.
They may not have the information that you do - as this profile lists - unknown for children - and if you provide details, the profile manager might add your Dad .
You could also volunteer to join WikiTree and start your own branch of this tree.