I was looking forward to finally unlocking Career Driver Platinum level by completing some endurance races in the Showcase series. I have all three required badges unlocked at Platinum level, but Career Driver stays at Gold (I unlocked Making a Name last). Very unhappy now! 
Turn 10, can you figure out what is going on?
I think this is quite a common issue. I hope that it will be fixed every time there’s a content update, but I’m still stuck at gold.
I’m in this boat as well. All career achievements complete and all badges platinum; Career Driver’s stuck at gold.
-Flash
I’m also looking to unlock my Forza Faithful badge now that I’ve gotten past Tier 2 (when it’s supposed to unlock).
Looks like badges in general may be buggy.
-Flash
Same thing for me. Got all 3 platinum badges, but career driver remains gold.
Me too, unfortunately.