I have had my istick 50w for about 24 hours now. I the issue I am having is that all my 1.8ohm tanks are reading 2.0ohms on the display of the iStick. This is the case for my Aspire ET-S and Nautilus Minis. On two occasions the Nautilus tanks have read 1.9. Never 1.8. Even with brand new coils. I get the same result on 4 Nautilus Minis and 3 ET-S tanks. I get the same results with the mod turned off when I screw on the tanks as I do with the mod turned on. Any ideas or suggestions?