Blood angels - the Sanguinor

I do understand their new still, but getting about half of them painted and ready to play when I came across this, and my Friend asked the same thing so I think it might be a typo,

The Sanguinor, unit type Jump Infantry. -- hq choice

Hes a non-independent HQ choice Character, with a ability that effects units?

I guess the question Really is, Did they do this on purpose? or accidental?

On purpose. He can't join a unit, but his ability is a proximity ability. He's supposed to be supported by your other units to be effectively used.