I have been using an IGO-S on a DNA20 NES mod quite happily for about a month now and I have encountered an issue today. I use the word issue because it doesn't really seem to be a problem. I just find it odd. When wrapping my coils I shoot for 1 ohm and I am normally spot on, but today my coil came out to 0.9 ohm. No problem. It fired normally (aside from the initial flashing resistance reading which I assume was to warn me that I was sub-ohm). I locked my control then dripped and when I unlocked the control to fire...The display was upside down. WTH? Everything still functions properly, but I don't understand what may have happened to cause something so odd. Anybody ever experienced this or have the technical know how to explain to me what happened here?