You are wrong, this is right - for each stat, other than HP of course, will have a Nature that decreases and improves the stat.
- Hardy is for Attack
- Docile is for Defence
- Bashful is for Special Attack
- Quirky is for Special Defence
- Serious is for Speed
So yeah, this isn't a typo. In game, the shaded red and blue stats in a Pokemon's summary will not be shown for these Natures, since they don't do anything to the stat.
It might not be practical (typical Game Freak), but that's the way it is.