I just dried the connection and it's working. Let's see if that fixes it for good. Nope, atomizer short again.
Is this a coil that screws into the base?
If so, take the coil out completely, and use paper towel to make sure all your threads are clean and dry - both on the coil and on the tank where the coil goes, as well as the 510 threads of the mod.
Then, screw the coil in until you think you have it in tight, then, using another paper towel, grab the coil and put some umph into turning the coil some more - it's likely to give another full rotation turn, possible two.
Then put it back on the mod and try again... see if that helps.
When I was first using a tank with screw in coils I thought I was screwing them on tightly enough, but I wasn't... I used a paper towel so my fingers didn't slip and was able to get another full rotation in and it solved the issue I was having.
I'd say between you getting a short message coupled with leaking into the 510, that coil is likely not in there securely enough.