Game rating score incorrect.

Hello, today i changed my game rating for the game Endless World from 3 stars to 4 stars. However the average score went from 2.73 when i gave 3 stars to 2.71 when i gave 4 stars. This does not seem correct.

I'm not sure what formula Eric is using as the average I'm coming up with is 2.4 and 2.6 if I use your 4 star rather than 3 star. Hopefully Eric will let us know what we're missing here.