I’m glad you were able to connect. I was actually trying to replicate the behavior and was working well on my end. I think what happened to you is you were using the old agent, and that has been having problems and we are actually ending support for old agent July 1st. We sent an email back a few weeks ago reminding of this change.
You should be able to add widgets to projects. Just drag the device to the project dashboard and select the sensors you need.
Yes, scheduling is not working yet with our new agent and we will add support, but we don’t have an ETA yet. Please see Raspberry Pi Agent 2.0 for current limitations.