iPhone iOS7 + iTunes Match (on iPhone 5) not playing nicely: cannot use cellular data

2 things:
1. I have the phone set to allow streaming over cellular data. Typically when I'm out, (driving, for example) I may want to listen to a song or album I haven't previously downloaded. Usually, I can scroll through my entire catalog and download the song over LTE. Since iOS7, I have been unable to do this; however, I still have the option to "use cellular data for music" enabled in settings.

2. Today, I cannot even view my entire catalog in iOS match (I am not on wifi right now). I can only see what I have downloaded to the phone. This is not normal behavior. I tried turning iTunes Match on and off as well as turning cellular data on and off: no change.

Has anyone else noticed similarly wonky iTunes Match/iPhone behavior? Any suggestions for me? My phone is my preferred music hookup in the car so I'm sensitive to change in functionality. Being able to access my entire library on the go is why I have Match.