Fastest way I've found to contact SmartVapes is via email to:
cs@smartvapes.com Usually works better for me than their web site.
Just out of curiosity, have you tried the DOA one on a different battery or mod? Sometimes it's just not making contact. Sometimes it's just open.
If you only put 4 or 5 drops in the working one, you didn't over fill it. But perhaps you waited a bit too long before taking your first pull, and before the wick got its initial wetness going, a little went out the air holes. (I presume the leak was from two air holes just above the threads since the bottom is sealed). This can also happen if all your e-juice went down the sides of the atty, and wound up in the nickel mesh around the outside of the ceramic cup. Once the wick and ceramic cup are semi-saturated, your aim doesn't have to be as good. A brand new atty sometimes requires a little different procedure than it will once it's been used a couple of times, especially to insure you get the wick saturated.
Did you happen to notice where your drips went when you were filling the atty? I aim for the center of the ceramic cup, but it's an easier target to hit with the shorty attys. Have you tried using the working atty again? Are you filling it on or off the battery (and as long as I'm asking, what battery/mod are you running it on)?
Even if you don't wind up liking the SV atty's, I'm sure you can find one you do like, but don't give up on them just yet.