Actually, you *can* multiple link, but not automatically; you'll need to manually copy the code for the file over to the other page, though here I do agree that it probably should be on the Liszt page more than the Wagner one, though it being on both is also very understandable (but it probably has to be on the page for the entire opera if it is included among Wagner's scores).
You have sysop privs, so you can do everything that I can do to this wiki (including deleting pages, moving pages, unprotecting pages, etc.), so it shouldn't be too hard
![Smile :)](./images/smilies/icon_smile.gif)
I won't clean it up right now partly because I don't have much internet time left, partly also because I'm not too familar with the piece, so I'd probably make some mistake anyway.
-- Feldmahler