I noticed it too on my Marauder back then, but I don't see a reason to use it. As I see it then dps dosen't do shit to your styles...only white damage. I went for the elite reward in Chaos chapter 12 or 13, I think.
well, I did more style damage with that one than the other three weapons I tested anyways. One of which was the elite chaos chapter 8 reward with tons of str and then two other higher level ones with 30'ish dps, but lower str.
As I see it then dps dosen't do shit to your styles...only white damage.
It's also a typo so it doesn't give you the DPS it stated, already been tested by some people on WHA.