I use the mini all the time, in the last 2 weeks it's all I've used, on my cruddy lavatube. The issue you describe is a pet hate of mine and it affects all tanks and clearomizers of this type I've used. The problem seems to be if you lay your device on it's side, juice wicks into the airflow tube. Also, as previously mentioned it is worse if you fill too close to the 2.00ml line as it can wick down even if standing up. I've found not overfilling and stand your device up is the best cure, not much help if it's in your pocket though
This was the answer i was looking for!
It's obviously not supposed to do what it was doing, but i couldn't for the life of me figure out why or how it could happen. After i cleaned it out and filled it back up i was ...... that it might have been faulty, or worse that i had broken it when i cleaned it out previously.
As i said i took it all apart and let it sit to get bone dry(and a hair dryer for added benefit) and filled it below the halfway mark, and that settled it. I can tip it a bit and I've run it through some stress tests turning it upside down, shaking, filling as close to the wicks as i can, with no problems. I still won't go past 1.5ml if i'm going to have it my pocket though just in case.
I was wondering what that little round thing above the coil could be for, i imagine it's there to limit these kinds of shenanigans :\
Thank you
[postscript]
As with most beginners i imagine you end up reading a lot of material from a lot of sources. And i remember reading somewhere that even though it said 2.0ml that you could actually fill it past that mark. At the time(before i owned one) i thought hey this will be great, i won't have to refill it every time i want a vape. This is also why i originally thought that a cartomizer would be best because i wouldn't need to refill or drip every time.