I've noticef that too.... Sometimes when i fire it reads 1.75 and the next it reads 1.84I also run the 1.6 ohm coils at 10W. Any higher and it gets blegh.
However, @Spongebob - check the resistance on a mod. The Aspire BVC coils are known for not being on par with their resistance. My 1.6 ohm coils often come in at 1.75.
even if i unscrew the tank and screw back i get a different reading every time? What is thr most popular coil for the Nautilus? The 1.6? What manufacturer?
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although it might be my style of vaping as well? Since i started vaping i always " double clutch" as one puff doesn't seem to give enough satisfaction? 
although again high VG.... Wonder if they still do as they were more "satisfying"?
another noob question?