I noticed on reviews of my mission (and others) that the stars (out of five) aren't actually averages. My mission has two ratings: a 5 and a 4. That's an average of 4.5. But in the available missions list it has a rating of 2 stars.
I've seen missions with 3 stars that should be 4 etc. Anyone else notice this? It is a bit misleading to those who will only choose to play high rated missions.