Example: If I want to add a name (say Joe Bloggs) as someone's father I'm presented with a list of same names to choose from which are already on my tree, BUT as I have a lot of Joe Bloggs the list does not include the correct one and there seems to be no way of getting round this problem.

If you type more of the name the list narrows down and shows more details so that you can differentiate.

The other option is to go to that person's page (say Joe Bloggs) and then click the "Add Father" link.