Yesterday, I registered on ShakeNet and 2 of my three sensors were displayed:
I was missing my RS1D: RAB8F. I checked and I had a typo in the email address for the 1D. I updated the email address to the email used on my ShakeNet account and the email used on the other two sensors.
It has been 24 hours and the 1D had not appeared and the My Shake page.