Hello there mmmnl5,
You may need to quit iTunes, perhaps restart the computer and use the Update iCloud function outlined here.
Songs purchased from multiple Apple IDs
Songs containing DRM (Digital Rights Management) may not appear, or may appear grayed out in iCloud. This can occur if your computer is not authorized for playback of that content. Try authorizing your computer, then manually update iTunes Match.
- To determine what Apple ID your computer needs to be authorized for, locate and select the song in your iTunes library.
- Choose File > Get Info.
- In the Summary tab, locate the Account Name field in the right column and write it down.
- Click OK.
- Choose Store > Authorize this Computer.
- Type in the account name from the Summary field and its password. Click Authorize.
- Choose Store > Update iTunes Match.
From: iTunes Store: Troubleshooting iTunes Match
http://support.apple.com/kb/ts4054
Since your computer is already authorized you can skip that part.
All the best,
Sterling