I have more licenses set up (3) than appear to pay for (1) ??!!

[Newbies101]

Hi,

I'm helping a project set up teams as a pop-up organisation. We selected the Business Premium subscription and for the £15/month rate were able to successfully establish 3 admins with fully licensed powers within our 365 organisation. 

However - now I'm being asked to add a further fully licensed admin and it is, as expected, saying that will be £15 MORE a month. 

How am I only paying £15 for 3 licenses currently? Is this a glitch or does Premium automatically come with 3 licenses? 

If I delete a licensed user account or unassigned a license will the glitch undo itself forcing me to pay £15 for every licensed user?

Any insight deeply appreciated, thanks.

[#2]

Best open a support case with the Billing team: https://support.office.com/en-us/article/Contact-Office-365-for-business-support-32a17ca7-6fa0-4870-...