Hello Simon,
No, there is no issue in having one or more than one Shakes. I have four here and they all work fine.
I can indeed see the 1D connected and live streaming data to our services, but the 3D is not visible, it seems. It may take up to 24h for a newly connected Shake to appear on StationView and since we have passed this mark, could you please download the logs from the 3D and post them here?
Instructions on how to do so are on this page: Please read before posting!
Thank you.