That's not the function of the resistance setting for a mod. You're just covering up a bad connection issue. Either the 510 or the atomizer.
One of the reasons I'm not all that thrilled with the VT75 nano is the 510 isn't as reliable as it should be and not a good design to begin with. I haven't had any issues with it yet but I am leary of it. The 510 on the SMY didn't look all that great either.
Back to your issue, I'd try taking it apart and putting it back together and make sure all the o-rings are in place correctly. I've taken a few of my KF5's fully apart and had no issues with any of them (6 in rotation).
Thanks for your input, but I'm afraid you're wrong. It acted that way on all of my mods, not just the SMY.
As soon as the outside temperatures came down a bit my mods read the resistance just 0,01ohm from what I had set it too manually and it works normal again. So it must have been the hot weather that caused it.