When I'm rotoscoping a complex shape (for example a fist which gradually morphs into an open palm with 5 wiggling fingers ), I'm using 1 layer for multiple roto shapes. And often when I try to move one of the shapes' control point, I activate overlapping shape's control point which lies very close to my intended control point. And even though I try to click around on multiple areas with Pick Tool, the accidentally hit control point remains active. Very frustrating.
So I wonder if have to hold some key while clicking (tried Ctrl, Shift, Alt)? Or should I use multiple layers after all? (I heard that it's not good because it will cause more keyframes and more work)