If you have pressed one of these Buttons they normally should be displayed in orange:
But the new Buttons (Weapons, Vehicles,...) are not orange
(They are also colored if you go manually to your statistics)
Yes, because this button doesn't exist in orange by battlelog.
This isn't a bug. The work to make it orange is really to much for this minor case.
Not only graphic related, a system to highlight those new buttons when on such page is not existing and would also be required to make it working.