"Star" issue

The game is awesome, BUT whenever i finish any level on 3 stars it shows me only 2 stars in the mission list. Even if ( for example ) 19 sec was required to get 3 stars and i finish it in 17 sec, it first shows me 3 stars in the table right after reach the finish, but if i open the mission list after that, i will see 2 stars only. I wonder, why?

Just For Fun tgj. 2015 about Stickman Downhill