Are SkypePhone and Skype on Different Networks or Subnets?

I've been using the new SkypePhone2 here in London and have noticed a quirky anomaly.

When I'm on a Skype call on my Mac and I reject a second inbound call to send it to voicemail the call keeps ringing on the SkypePhone. But when I'm on the SkypePhone and a second call comes in, I don't get a second "ring."

The second thing that happens is the delay in IM's to the SkypePhone. I can find chats from days ago popping up as "new." That leads me to believe that the presence engine needs some tweaking as it's not exactly current.