Sorry for the frustrations here. Yes, the old 1 WS + 10 Render Nodes should show up as "1 GUI and 11 Render Nodes" under the new system (as our workstation in the old system contained one render node by default). And yes, that should still apply so long as the subscription is kept renewing.
If there was an interruption in the payment which caused the subscription to drop, please contact our support team at support.chaos.com and "Submit a Request", asap after any failed renewal, let them know the situation that lead to the interruption in the renewal process so they can look into it. If that hasn't been done already, I'd suggest doing that right now :) If you can share a screengrab with them that shows the Licenses section, so we can see what it is reporting to you that you have available, and of course let them know the email the licenses are under etc. that would be great.