You are wrong, this is right - for each stat, other than HP of course, will have a Nature that decreases and improves the stat.
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- 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.