I have a driver with all stats at level 30. However, the driver is rated as a level 28 driver(4 and half stars). Can someone please look into this, I fear this affects her performance in races.
The name of the affected driver is Sophie Williams.
It's visual, it wont affect performance. It's been this way forever, it was the same when maximum was L20.
I remember many years ago Jack actually ran a script on the database to update all of the L19's to L20 but speed wise it made no difference.
If you want your driver to be L30 you need to hold back training on one of the Mental stats (leave it at 29) until Experience gets to 30, then train the final stat and your driver will jump to L30.