This has been an issue for some players since the new mod first came in. Seems to be no rhyme or reason why some of us experience this and others don't, but it is happening but not to everyone. Most notably for myself, I found a shorter effective distance for my shottie as well as the problem of seemingly shooting Strait through players and I also experience the knife issue as well.
When it really gets to me I play another server be it ours or another clans depending if ours are populated enough to join or not.
We had the old mod on a separate server but it never got populated funnily enough.
Bask in the frustration lol.