very possible that I did not tighten enough initially. I hope that is the problem!

It sounds too me that a) I need to tighten the RH crank bolt all the way down to where it "bottoms out" and b) its impossible to over-tighten it. (which is strange because I've heard if you tighten it too much, there will be rotational friction.

Ill give it a shot though... thanks everyone!