Mine sometimes comes on briefly in the morning, usually for less than 2 seconds. I think it is related to how cold the car is, normally it doesn't. So I would say it is perfectly normal, pros of an advanced Diesel engine.
I can't say that I have noticed on mine but I got into the habit of turning the ignition on and then putting my seat belt on before starting the car 20+years ago with my first diesel car and old habits die hard and all that.I do also always wait for the dash test to complete before starting (that's a consequence of having had an Aprilia Motorcycle).
As with the 2008 the 207 and the Fiat Grande Punto I had previously didn't need the glow plugs to heat up before starting anyway - modern diesels are pretty Damn good innit?