I have done lots of searching on here regarding refilling the ego-c/leaking, and the thing that puzzles me is the talk about the cap at the end of the tank. The threads I have seen seem to say that people leave the caps on when replacing the tank, but it doesn't seem like the tank will fit in the cone with the cap off. 
I have gone through one tank by taking the cap off, filling thru the little hole with a syringe, then holding the unit upside down, jammed the tank in, and puffed away.
When the tank looked almost empty, I held the unit upside down and pulled the tank out, and noticed a pool of liquid around the atomizer. Is this normal, or is this the leaking people are referring to? I'm thinking this might be annoying when changing flavors, especially.
If this is normal, and I am not doing anything n00bish, then maybe the folks saying ditch the tanks and stick with cartos are right
Thanks for your patience and advice!

I have gone through one tank by taking the cap off, filling thru the little hole with a syringe, then holding the unit upside down, jammed the tank in, and puffed away.
When the tank looked almost empty, I held the unit upside down and pulled the tank out, and noticed a pool of liquid around the atomizer. Is this normal, or is this the leaking people are referring to? I'm thinking this might be annoying when changing flavors, especially.
If this is normal, and I am not doing anything n00bish, then maybe the folks saying ditch the tanks and stick with cartos are right
Thanks for your patience and advice!