I don't think So Far Away contradicts you, since it's irregularity (as far as we know). I'm always thinking maybe this song recorded between when Mark left the band to when Chester joined. They didn't have someone to sing the chorus so Mike did it by himself. But it's just an idea.
The Stephen Richards' part is a lot easier than NRL. Don't forget Mike didn't sing on a daily basic, he's not a typical singer, I'm not even sure if he takes voice lessons consistently.
http://lplive.net/shows/20010414.php
Chester didn't sang the last chorus at all except than "and I'm about to puke".
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http://lplive.net/shows/20010724.php
Chester hold the Canadian flag during A Place For My Head and One Step Closer.
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http://lplive.net/shows/20130813.php
http://i.imgur.com/RTRfTjX.jpg
http://lplive.net/shows/20130819.php - link not active yet.
http://i.imgur.com/dR1CA4V.jpg
Just wait. I'm gonna do it anyway soon as the taper will send me the files, and it's pointless to have two circulated versions of the same source when one is in better quality.