Hey HappyLittleBoy,
The different sword animation you're seeing could be because you're using an outdated version of Wurst. The sword animation was closely matched to the vanilla one starting from Wurst 7.42, but I'd recommend updating all the way to Wurst 7.45 to ensure you aren't encountering any old bugs that have already been fixed.
If the animation still looks off after updating, could you provide some more details? Let me know which Wurst and Minecraft versions you're using, as well as which hack you used to attack and how that hack was configured. A screenshot or video showing the difference would be super helpful too.
