Lattice Arm rig not smooth

I have this little arm rig that works really well, but when I rotate it in pose mode despite segments being set to max (32) its all choppy. Also the end of the arm is turning the wrong direction for some reason…

Resting:


Bent:

That’s grease pencil, right? Looks like you need more resolution or more points to get smoothness. You should be able to select it and Stroke > Subdivide

Oh ok I subdivided it and now it looks a lot better! Thanks!

But what about the ends of the arm like moving the opposite way? What’s that all about?