After "update all", the Update button still appears beside updated apps [$25]
1. Run appcenter
2. Click "installed" tab
3. Press "Update All" if updates are available
4. Provide password and wait for updates to finish
5. Look through the "Up to date" list. Applications which were part of the update still have "Update" buttons.
6. Clicking the Update button results in error.
1. After update all, the update button is removed from the applications which have been updated.