Ya Niley I know this happens with frost mages and is a serious pain in the ass, I've never had this problem on my shaman though. I'll get off my butt tonight and DL fraps to show you what happens for me.

I'll flameshock(no crit) LvB (crit proc CC) CL (crit proc CC) but you can see the mana cost stay reduced from the LvB and the charges quickly go 2-1-2. If CL doesn't crit it of course stays 1. So I honestly have no idea how to duplicate the scenario.

I'll try with and without a castsequence, since I know sequences slow down while waiting to cast the next spell on higher latency connections (e.g. mine in Korea). I'll also respec to match your talents exactly. Are you standing at the absolute max distance that allows all 3 spells?