Excluding PST/OST files not working BE2012

I have a 2.2 TB File Server (CIFS Shares) with many PST/OST files on it that need to be excluded from Daily/Weekly jobs.

Within the job, I goto details and am able to select it per drive, but once done it doesn't appear in the details and when I watch the backups run PST's and OST's are getting backed up.  What's with that?

Mark