Haha, no, yours is fine.
The pronunciation I called dubious had the emphasis on the last syllable. Is that not a bit strange? TolkiEN instead of TOLkien. I see differing pronunciations of it everywhere, including those you listed, because one of the Houses at my school is named after JRRT. You see people who have never heard of him before (I know!) staring at the crest on their uniform, wondering what to say.
Sometimes it seems people are unsure how to pronounce it and simply say 'the guy who wrote The Lord of the Rings' or something to that effect. I too have gotten 'you know, that one you sometimes go on about'.
On a similar note, I have also heard Numenor sans the 'oo', as in
Numb-enor.
