How to move a point with Pen tool: WHY IS IT CLOSING THE LOOP??
Okay, forgive me for asking a question that may have an obvious or incredibly simple answer, but I truly am stuck here.
I am trying to create some simple curved paths in AE with the pen tool. I want to move the points on the line around as I tweak the shape and position, but I am hitting this maddening issue: when I move one point on the line, it's fine, but when I try to move the other point, AE seems hell bent on trying to close the mask (meaning, the line becomes a looped shape). I just want to move this one point! This little circle icon appears next to the pen tool when hovering over the point:

I have tried every variation on the pen tool, holding down every possible shift/ctrl/alt, and already waster about an hour googling this, with no success. What am I missing here?
Thanks in advance!!

