If you learned a bit more about Views in MC, and added a tag such as "Source" or "Format" or "My special category", or used an existing tag like [Grouping], you could include that in Views to separate out your different types of tracks into their own Albums, I'm sure. There have been threads on this topic before, with different approaches suggested.
The built-in Views in MC are really pretty basic so that they work for everyone, but the power of MC is that you can build your own Views and display your music the way you want to see it. Drilling down through the Files list is not the best way to use MC, but I understand that it is the familiar way, because that was the only way to do it with other software.
Grouping by [filename (path)] isn't a bad idea, but using a tag allows an easier way to enforce naming of the "Source" or whatever, and quick editing to fix incorrect entries, without having to actually move files on the hard disk. There is no assistance of this type using the filename path for grouping.
