That's how weapon sway usually works, alongside innate weapon spread, but there are legitimately misaligned iron sights at 0 spread and perfect stats, unintentionally from the devs. Other fun bugs include increased aim shaking when further from the center of the worldspace, micro stutters, an inability to play beyond 60FPS without destroying physics, weapon lighting assuming light sources are not where they actually are, and more!

All of these are fixed, and result in a New Vegas as you remember it, not as it actually exists. Absolutely worth playing with VNV.