Hi randy_m,
If you are having issues with your iPod touch turning off iTunes Match unexpectedly, you may want to try some things to troubleshoot.
First, quit all running applications and test again -
Force an app to close in iOS
Next, I would try restarting and if needed resetting the iPod -
Restart or reset your iPhone, iPad, or iPod touch
If the issue is still present, you may want to restore the iPod as a new device -
How to erase your iOS device and then set it up as a new device or restore it from backups.
Thanks for using Apple Support Communities.
Best,
Brett L