iTunes Match not allowing me to add more devices

It would appear that iTunes Match will only allow you to use the service on 5 "devices" total. This would seem to include ANY type of device, not the normal iTunes/Apple ID that allows you to authorize up to 5 computers, but seems unlimited on the number of iDevices (I have 10 iDevices on my current AppleID with zero issues).

Originally, I set up iTunes Match on 3 computers (which is not all of my computers) and two iPhones. I then tried to access Match through my Apple TV and it gave me the error message that I already had the maximum number of devices in use. So I removed it from two fo the 3 computers several days ago. I just tried to add my daughters iPod Touch and it gave me the same error even though I currently only have iTunes Match on only 3 devices total.

Any help would be appreciated.