Maybe this is a BUG?

I found something interesting, and maybe there is a BUG. There are two pictures below, both of them are captured from the official site of Steam. You can also find out them here Steam Community :: Gears 5 :: Achievements

The first is the completion rate of the achievement Generally Awesome, it is 0.4%. And the second is the completion rate of the achievement I’m The Captain Now, it is 0.1%. How can someone become a General without been a Captain in the game? So there must be something wrong with the achievement system! Please check this out and repair it.

Player drop off?

No. Everything is normal. I have ranked here

but I don’t have the achievement of I’m The Captain Now. And some other guys I know also have this situation.