Google Music - Matching still doesn't work

The matching feature was introduced about a year ago. I am using OSX, the version of MM is 1.0.84.1107. I'm uploading albums that are in the Play Store and some match, some don't, uploading each song, encoded at 320 kb/s. I would guess it's 50/50 whether it matches or not, maybe worse on the non matching end.

is there anyway to get it to recognize all the songs and match on them? Or something out there the goes into detail as to how it matches? Thanks in advance.