this is not a bug
the number given for the weeks of injury is just a rough guess your dokter made when the injury occured.
It might be that the injury heals a little faster then expected, but mostly it takes a little longer.
It is not abnormal that a player injured on june 24th is not recovered from a 2 week injury by July 8th, most of the time it will be somewhere in the week after that. Besides 2 weeks can be 14 days, but can be 17 days just as well. The injury probably says 3 weeks when he must heal 21 days or longer...
Expect your player to be fit again any day now.
They are not your friends; they dispise you. I am the only one you can count on. Trust me.