1) No, it doesn’t happen. I have waited 3x the wake-up interval, the values do not change. Regarding this, a little idea came to my mind: If it really worked the way you said you should display the current value (currently set in the device) plus the input box (value to be set in the next wake-up phase). That way the user can distinguish between the two.
2) Good idea, I put the sensor right next to the diskstation. The temperature is now being submitted. But this sensor still won’t show me all the cool fibaro parameters that I can see for the other smoke sensor. Another idea?