Plus Plan

I just upgraded my Ring Doorbell from the Basic plan to the Plus plan. Now I want to add my flood Cam to the Plan but it is saying that I have to pay another $100 for a seperate plan. These devices are 20 feet away from eachother and are both on my network. Why does it think it's in another geographical location and what can I do to resolve this? Very frustrated with this, especially since I just got a stick up cam tonight and I don't dare hook it up with all these issues. TIA