Yeah, my Left Winger has had 2 league games rating 10 in each and is rated 9.84
My Right Winger and Striker both have had a 10 and a 9 but rate 9.49 and 9.46 respectively.

Its either a buggipops or match ratings have a more precise value to 1 or more decimal places but are displayed as rounded up/down whole numbers in some screens.

I vote bug though.