Hi, what wattage did you use? When I use the 0.7 mesh I will start at 16 watts and rarely feel the need to go above 18. I'm not sure about the 20-25 watt rating for these coils, I've had them burn pretty quick at 25 watts. Make sure you start at maybe 16 and see how that goes? It's difficult to say whether you have the same issue I had, but even when it's wicking well, some bubbles will appear when I open the top cap. I would try another coil, try to salvage the juice and try it at a low wattage.
Edit: like eyeball kid said, start at 12
I was getting dry hits even at 12watts! Ive noticed that the machining/threading does seem to be too low like in your pictures!