vtc

I recently purchased the evic vtc mini and after getting frustrated with their tank, switched back to the nautilus aspire mini tank. actually, my brother gave me his two tanks (one mini, one full size) and after they kept getting flooded, i purchased a new tank. but i keep having the same issue...

Everytime I put a dual coil build on my device, it switches from temp control to power mode. Can anyone give me any insight? I'm pretty novice when it comes to vaping in general. so any tips will help me out.