Sneak was my first skill to hit 100, yet I held off getting Shadow Warrior right away because I had just started obsessing over Enchanting. Still had an absolute blast sneaking, though. Then I happened across http://www.youtube.com/watch?v=NO7Ch2sk1AA. Boy, that well blew my mind. It's tough leveling up once you're over level 60, but I worked at it and was rather pleased when I hit 62. Now that I had Shadow Warrior, I donned my shrouded gloves and equipped a Daedric dagger (Legendary) and a Blade of Woe (also Legendary). I then performed a sneak attack on an unsuspecting guard to initiate combat. Turns out that I'm not at all able to move from sneak attack to sneak attack like in the video: when I crouch in combat I do turn invisible but my foes mostly just carry on attacking me, and when do they stop attacking it's still a regular hit no matter from what direction. Am I doing something wrong? If so, what? Or is this a known bug?
I'd tremendously appreciate some http://www.youtube.com/watch?v=TU7JjJJZi1Q here. Thank you.

