So what exactly is your question, you have enough license you cover your cluster, you have valid licenses and are borrowing from the higher tier to make up for the lower tier model.
Are you just looking for a better understanding of how cisco unified workspace licensing works?
There are data sheets explaining it in more detail but it is based off the principle of users and phones are assigned users via the owner user is field on a phone. With cuwl pro 1 user could have up to 10 devices
