Matching lyrics can indeed be a real bugger, especially when it turns out to be the wrong tune, though sharing a title; it's also often the case that people have transcribed lyrics so badly that they wouldn't fit the right tune anyway!  If I can't match them, I don't post them; when I can, I usually specify any changes I've made.  If you do sometimes have trouble fitting the two, please feel free to ask me for a second opinion; I'm certainly no expert, but appear to be developing a (probably regrettable) talent for such things...

Malcolm