im new to DNA device and decided to have a HCGAR VT75nano, the problem is. after some tweaking (for the weak battery warning) ive notice that when i fire my device at a certain watt (Power/wattage mod) it doesnt fire accordingly to my desired setting, Like When i put the watts to 30watts, when i press the fire button, it will fire at 26watts first like .5 to 1 sec then it will fire at 30watts. is it normal? and the warning message (new coi/ resistance Yes or no?) everytime i put a new coil or atomizer is gone. can someone help me understand this. if its normal or something is not right. thank you very much.