A Billing Question: 3 licenses?

I manage a small office (2 people). We planned to have a 2-user system with 2 GoTo connect licenses.

We got a Yealink cordless DECT system.  I configured it with the help of GoTo support (who was great, by the way!), but now when I look at my admin console, it says that I have 3 (not two) licenses in use. 

I opened a support ticket, and was told by someone at GoTo that the base station would - in fact - require a third license.  Well, that's a problem for me, because if I have to pay for three licenses, I'm paying more to GoTo Connect each month than I was to my previous provider.  

Is this really true? Do I have to license the DECT base station and every handset?  That's not gonna work for me at all.