Um, what? There's a fair bit wrong with your post, but I'll address primarily this.
6.6V to a .1 ohm coil is 66A or 435W. So... what?
Even at .3 that's 22A and 145W. While not impossible, that'd be an unavoidably hot vape.
I will reply back to this with a few pictures next to a clock so you can see how each time I push down a button in 1 minute how the atomizer jumps all over the place. Here's an example of 63 watts and over 5 volts to kind of disprove what you're saying. I know what you're saying... and I agree. These readings are far from accurate. But I can assure you, it happens - and not just to me. A guy at my vape shop had a Sigelei 150w and a Herkeles RTA and he had 2 coils @ .2ohms and was set to 65 watts @ 6.2v.. that was the first time I saw something like that... and I asked the guy... "Isn't it unsafe to be vaping above 4.2volts?" He just said the Sigelei sometimes will double the volts per battery... Or at least that's his theory, becuase I took a drag off his Herkeles @ 6.2v and it was nice! It wasn't hot at all, mild to warm temperature I'd say.
Anyway...
Anyone else having issues like this?