Currently Being ModeratedJan 23, 2012 3:26 PM (in response to Andy Fisher)
This is well documented here. You will be able to find dozens of discussions if you do a search.
To quickly answer, this is most often due to the fact that your album is not the same ussie as that in the iTunes store (usually due to remasterings).
As for what you can do about it, some people have had limited success with this, by altering the files to make them more similar to the iTunes version. If you look at the other discussions you may get some helpful info, but don't expect it to be easy, or to be able to solve all the non matches.
Currently Being ModeratedNov 16, 2012 11:08 AM (in response to Andy Fisher)
With effort, you can search this support site and figure out that a lot of people have this problem, but that nobody really knows why it's happening and thus if something can be done to mitigate the problem.
Hypothetical sources of the problem are:
- the artist decided to replace/remaster one track on the album so that all but one track match
- the artist replaced all tracks on the album, where most are sufficiently similar that they still match, but some do not
- Apple's matching software is less than perfect and thus hyptothetically could be improved so that a greater percentage of songs that should match actually do match
17% of my 600 or so albums (about 8% of my songs) have the partial match problem. I've gone back and forth with Apple support on this. Apple support has been annoyingly evasive, saying only that (1) could be the source of the problem and that would be out of their control, and therefore they will consider any failure-to-match as "expected behaviour" and thus will do nothing to address the issue. They've been very careful not to conceed that (3) is a possibility -- ie. that there is something they could do to mitigate the problem. I think everybody knows (3) is part of the problem and Apple's refusal to acknowledge this, IMHO, makes them look bad.
"regretfully, the investigation team has confirmed that some select songs may not be available to match the content within the iTunes Store and unfortunately that cannot be changed as content is edited frequently within the store at producers discretion. This is beyond our control and we cannot always guarantee that using the iTunes Store or our programs will occur without some issues, such as these." (sic) - Apple support