There is a visual bug with displaying the correct DPS a weapon does.
I was looking up High Quality FDA Caterwaul 913 on GMI and I found one that was of a higher QL than my Yatamutchy X-3 Counter-Sniper Rifle. As I was looking at the description I noticed it was significantly lower DPS than my weapon when it should have been higher. I looked up a higher QL Yatamutchy X-3 Counter-Sniper Rifle and noticed that it was the same DPS as the caterwaul I had recently looked up.
I looked up the items in bot and they gave me the correct DPS values.