It seems to randomly group some tracks and not others... I have tried changing album name to match, and composer to match as well...

What's the logic behind it? What common values does it look for and group?

It also seems that if I edit a field across several tracks, it doesn't automatically update the collection - I have to tell it to re-scan. Which takes an awful long time when you're dealing with an 80GB collection...

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Also, instead of creating another post... figured I'd ask it here as well... How do you delete a file from the disk? Let's say the playing track is total ****... I want it off my drive and not wasting space... Where is this function?

Right now, unfortunately, there are some issues with groping tracks from some sources, such as the file browser and loaded playlists. This is being worked on. Tracks form the Collection and most of the services should be grouped correctly.