My problem has been with Genius Mixes but not using Match, using Home Sharing with library on PC and shared with IPhone 4s and IPad2. Tried everything then I read about using the Remote App to allow for changes to DJ playlists. Since DJ playlists weren't showing up on my Home Sharing, I figured ...what the ****. Now everything...DJ mix, Genius & Genius Mix works plus if I want to alter the mix I can use the Remote App. Here's what I did:
On PC - Go To DJ Mix on ITunes
If it has never been set up you will get a set up message, continue then check the box "Allow quests to request songs with Remote for IPhone" Also check box "Restrict requests to source" then in the pull down screen select Genius. I did not enable voting or password. OK to update.
On IPhone - Install Remote App
Start up App
Make a change to the DJ playlist. Once you make the change you'll start seeing the Genius Mix Icon in the bottom control panel. When you select Genius Mix the IPhone will only show the first Mix. Swipe the screen to get the others.
It's possible all you need to do is install the Remote App, I not sure since the above steps were the first things I did with the App. Anyway it works slick plus you can now edit playlists and add new ones...Genius or otherwise, which never worked for me on Home Share using iOS devices.