Has iTunes match gone haywire?

Why, YES IT HAS gone haywire!!

The updated iTunes 12.2.2.25, with iCloud and Apple Music enabled, has duplicated my ENTIRE SONG library and made it ineligible for iTunes Match. My 30k library increased to 60k songs! I've lost music, had playlists duplicated, songs duplicated, lost custom album covers, and found that some of my songs that I burned from CDs or purchased elsewhere were somehow converted to "Purchased, Protected, or Apple Music" files. Now those files are apparently included in the 25k limit. All of this has royally screwed my entire library and has made it impossible to enable iTunes Match (or iCloud).

How can I quickly fix this?!!

I've used iTunes Match since it became available (with periodic glitches), as well as Apple Music.

Mac OS 10.10.5

@yearzero1 (and everyone else who has issues with missing covers in iTunes Match / iCloud Music): I have found a solution to restoring covers that are missing in the cloud (but are present in my iTunes "master" library). I took a close look at all the albums that were missing covers, and I noticed that all of them (if memory serves) were not added automatically after I imported the respective albums into iTunes, but I got them by choosing "Get Album Artwork" from the context menu in iTunes.

So I did the following test: I identified a couple of albums that were missing their covers in the cloud (by looking at the Music app on my iPad). Next, in my master library (which shows covers with all albums), I navigated to those albums in Album View and, one by one, right-clicked on the album, chose Get Info, and then added a JPEG file of the album cover manually (I gleaned the JPEG through an online search). Next, I chose File > Library > Update iCloud Music Library... and voila, the missing album covers appeared in iCloud (but only those covers I had just added anew to my library).

I then went ahead and did this (somewhat time-consuming) chore with all of my other albums that were missing covers in the cloud, and now everything is fine and complete again.

Long story short, there appears to be a bug that prevents cover sync for (some?) albums for which I manually retrieved covers, choosing Get Album Artwork in iTunes. I'll report this back to Apple as a possible bug (I don't know what else it can be, as prior to the June iTunes update and Apple Music introduction, my iTunes Match music library was complete with cover art work across all of my devices; the update messed it up).

I don't experience any of the oddities others have pointed out that appear to have happened since the recent iTunes updates.

I'm still trying to get itunes match to work! I have discussed it with apple and attempted many manyworkarounds, but after a day or two I am back where I started split albums/wrong data/wrong artwork. Used to be so enjoyable and easy to listen to music. Makes no difference whether metadata has ever been edited or not. It happens to apples own music aswell as uploaded cd's with manually added artwork/metadata. Hope there's a fix to this sometime, before I die would be nice.

Do you have lots of playlists, or is your collection strictly albums and (individual) songs? My library is strictly albums, no playlists, and everything is working fine at this point. If your software is up-to-date and your library is still messed up, I doubt any future software updates will be able to fix things. The problem my be with your library (and the underlying files).

IF you don't have any playlists (that took a long time to create and curate) AND IF you have a backup of your entire master library/music -- that is: the folders and files under Music > iTunes > iTunes Media > Music -- prior to when all of this happened, I'd suggest to try a radical move (proceed at your own risk): Remove your music from iCloud Music Library (iTunes Match); log out of iTunes on all of your devices; remove your local iTunes contents; close iTunes and remove all files and folders in your local iTunes library (NOTE: this will also remove any mobile apps, movies, and games, which is not a problem if you purchased them from iTunes/Apple -- you can always re-download them). Launch iTunes again so it can generate a fresh set of default files and folders (you will have to reconfigure your custom Preferences, if any); and then copy your backed-up music to iTunes > iTunes Media > Automatically Add to iTunes. Your library should slowly repopulate with your albums; when done sign back into iTunes and enable iTunes Match ("add computer to iTunes Match") to start the matching process again. I actually did this at one point, and most problems I experienced were solved. (Depending on the size of your library, you may actually want to try to do this in batches, and incrementally update your iCloud Music library, so as to speed up the process.)

Thanks for advice Mk but I have re-uploaded from scratch, doesn't make any difference and it's too time consuming to keep doing that, takes week to upload a library to itunes match. My files are either uploaded (cds) or from bandcamp/amazon/itunes/alfamatrix etc I have several playlists but they tend to be smartlists which are easily replaceable. My software is updated to 8.3 and mac install prior to 12.2 fiasco. DO NOT suggest updating as I do not want applemusic, it worked fine before so should not need to updat, I pay for a service ( which does not disclose restrictions on software). This is driving ne crazy though.