I've been noticing that the rear spoiler on my 991.2 engages at speeds well below 75mph. Sometime from a complete stop I would put the car in sport mode and notice that the spoiler is up when I pull away. It's been hot lately so perhaps that's the reason? Is this normal?

 

Yes, normal. Temperature management related.

 

Normal. I recall there was a thread on this same topic earlier. Manual doesn't mention it though.