Confusion over multi disc tagging

[paulg]

I have a number of double albums which for each one I like to group them together as a single multi disc. I can get it working by entering (Disc 1) etc after each disc. The guide and other forum posts suggest that I can actually give each disc a name.

I have attached an example of an album I've been playing around with. I use MP3tag and all my files are FLAC files.

You will see Disc 1 loaded. It shows (Disc 1) after the title. The second disc has (Disc 2) after and minimserver correctly groups them together. It would be nice to call Disc 1 Original Album and Disc 2 Demo's and Bonus tracks. In the example attached I have enabled the Subtitle flag in MP3tag and entered Original album but it doesn't make any difference.

What am I missing?