I keep running into the situation where instead of 2 handles I only have one - I suspect the missing handle is actually centered on the node itself but there doesn't seem to be any way to get at it.  As I cursor around I get all the handles, not just the 'selected node".   so is there a way to:
a) just get the handles for the selected node ? 
b) way to highlight the handle points so even if it's on a node, a user can click on it

? or is the 2nd handle sometimes not there ? 

I think this is somewhat a user question, but also a design/development question.