Metadata Incorrect

I am having a problem with the metadata in the database. I have followed the naming conventions as directed in the startup file. For example, I have added the movie Mash to the database. Before adding it, I checked IMDB; it is listed as MASH and it has a release date of 1970. So I have the file named: MASH (1970).mp4. Yet every time I refresh the metadata it comes up as Monster Mash? The odd thing is it keeps the correct graphic. This happens throughout my whole database. It seems like I’m always having to go in and manually edit the metadata.

Is there something I’m missing? Something I’m doing wrong?

Thank you.