Well rest assured that is not normal for those coils. Do you know the PG/VG ratio of your juice? Thinner juice is more likely to flood. If it's flooding I usually take the whole thing apart, clean out the airtube with rolled up kleenex and unscrew the coil and make sure there's no juice in the airflow control base the coil screws into. Once you've done that, I recommend using the rolled up kleenex trick and slide it into the top post on the coil, stop when you feel resistance, wait 5 seconds, and remove. That'll soak up excess juice off the wick in there. Other than that to prevent floods, I usually have the airflow set to 4 or 5 holes most times. I have it on 2-3 for new coils to make sure enough gets in there that it's not burnt and slowly open it up to the normal 4 or 5. With it all the way open I seem to get more vapor anyways lol.
Good luck!
Oh and after you unscrew that coil, make sure you clean up any juice sitting on it, you don't want it sneaking into the bottom when you screw it back together. And I usually use a q-tip to make sure there's no juice inside the base.
That sounds like lots of trouble, but once you've done it a few times, you can take care of the odd flood in just a couple minutes. And they usually are very rare.