Based on this i would also like to give a comment:
Please note that if you install multiple agents on one machine, only one license is counted.
e.g. you run 2 Windows Agents on one machine (for what reason ever), it will only pull one license from the pool.
You anyway can see how many agents are totally running, within the "Used (Host)" Column, The Used number shows how many liceneses are used and the value within the brackets show, how many agents are really running on that license category.