I found this site a couple of days ago and it worked for me. Hope it helps you people to. Not sure if it is already mentioned, but here it is:
http://www.mcelhearn.com/icloud-music-library-automatically-downloading-new-musi c-to-ios-devices/
I signed up for iTunes Match for the first time yesterday since I noticed they recently increased the song limit to 100,000. Once I enabled it on my iPhone I noticed it was automatically downloaded all my songs, which I was instantly confused about seeing as I know iTunes Match should be streaming my songs. In the hunt for finding a solution I came across some support forums about this issue and then stumbled upon your blog post. I think I got it fixed and wanted to share incase this helps others.
What didn’t work:
– Disabled “iCloud Music Library” via Settings > Music
Temporary Solution:
– Disabled “Use Cellular Data to Streaming & Downloads” via Settings > Music
– Turn off Wifi
Permanent Solution (so far at least but not sure which step below actually did it):
– Opened iTunes and Clicked on Store > View Account
– Under “iTunes in the Cloud” I clicked “Manage Devices”
– Found my iPhone and clicked “Remove iPhone”
– Returned to Music App on my iPhone
– It prompted me to sign back into iTunes and I declined (for now)
– It still said “Downloading 626 songs” and I tapped on that message
– I saw a list of songs trying to download but they seemed paused (probably since I wasn’t logged in)
– I scrolled to the bottom of the list and saw a link to “Cancel all downloads” (or something like that)
– I tapped the link and everything stopped.
Things I tested to make sure it was fixed:
– I waited awhile to see if it started back up but no more downloading was occurring.
– So I enabled “iCloud Music Library” again and still nothing was downloading
– So then opened up Music app again and I signed back into my iTunes Account and still nothing was downloading
– It reconnected my iTunes Match Library and everything was there and nothing started downloading
– I added a new album to my iTunes Library on my computer and it added to iTunes Match on my phone (able to stream it) without downloading anything.
So (knock-on wood) I think it’s fixed!
Hope this helps others!