I find that this is still an issue (not all songs on a CD matching in iTunes match). I understand that when a label issues a remastered CD ~or~ a compilation CD where the song may be edited even just a few seconds and iTunes match can't match it. However - what about new CDs:
Examples:
The new Nick Jonas CD. Most of the songs match - 3 don't (including the hit song 'Jealous' - which is a top 10 hit in Billboard).
Many obscure original cast albums match fine - but the new Pippin and Beautiful - which both won Tony Awards and live in the top 10 cast album chart on Billboard do not completely match.
I ripped my Best of Jackson Browne double CD and some of the hit songs didn't match (including 'The Pretender'). Okay, says I, maybe it's an abbreviated track for the compilation - so I slyly pulled out my 'Pretender' CD and ripped that track and it also did not match.
What gives, Apple - this isn't a free service and I'm ripping my own music. I like using iTunes match because it does a great job of equalizing the volume and while there are numerous tools to do this - I don't have the ears to do it properly and I appreciate that iTunes match does this for me. If I upload songs that do not match - the sound is not equalized and I have to futz around with the volume during playback - and that sort of defeats the purpose.