Apple's match support docs.

Question

https://discussions.apple.com/community/itunes/itunes_match?view=overview
I've been AWOL for awhile, so you all may know this, but seems somewhere along the way, Apple has posted support docs that deal with many of the basic questions.  Some of these docs we've seen before, but some have been updated in the last 3 weeks.  Mor importantly, Apple has put them on the iTunes Match overview page, so hopefully more people will see them.

Answer 1

Anyone seen any troubleshooting guides for any of these glitches?  Most have been reported except I don't see much on the first one, which is most troubling to me:
1)  Locked iPhone begins playing music randomly when Match is active (phone can be motionless, and shake to shuffle is off, anyway)
2)  General sluggishness of non-iTunes apps and phone when Match active (with and w/o music playing)
3)  General sluggishness of iTunes when Match active, slow stream start (but I'll give them that the stream is rarely interrupted once started)
4) Album artist sorting doesn't work
5) Album artwork comes and goes randomly