On Hit Detection and Backward Movement Speed [SFM]

I really couldn’t think of a decent title for this one. Picture the scene: You are a sniper. A sneaky spy as snuck up on you, but you’re ready for him. You turn to meet your assaulter. He back pedals and you run after him, ready to send him to his demise. You swing your melee weapon and... Nothing. You swing again. You swear you’re close enough but you just can’t seem to hit him, and worse yet, he doesn’t seem to be getting any closer, despite the fact that tells us that classes move