I had to delete the device from the Current Cost dashboard and re-
register, then re-register with Google Powermeter. I had to wait a
while (much longer than 10 minutes) for Google Powermeter to catch up
but it did eventually. Now, though, there are 2 devices on my Google
Powermeter dashboard. I'm hesitant about deleting the old one (I
changed the name for the new registration) because it's working now
and I don't want to mess it up.
Otherwise, it seems to be working okay. There are a couple blips on
GPM display that don't show up on the CC dashboard; possibly a
communication error between GPM and CC?