I have a little problème with 2 Actresses, In their name I write Devon for One and Devon Lee for the second.
When I look at the list Movie In Database from Devon I can see all movies of Devon Lee and the movies with all actresses wich name begin with Devon (like Devon Michaels...).
There is a way to fix this as I originally had the same problem until 1. I added all the IMDB webID's to all the actors (takes time but worth it) 2. Make sure that the line "UseActorWebID=True" is in the config file which is in the root directory of XMM7 3. Make sure the movie, starring tab has the correct ID filled in for all the actors involved
Now you can have actors with the same name but not the same person, the WebID is the unique value