I'd like to update that an ECF member,
@Shawn Hoefer said that my wick was not filling the ports. Honestly, I was skeptical that it would work (sorry, I should've had more faith in you, Shawn),but tried a longer wick anyway. I was thrilled this morning to find NO leaks in the tank. I am also glad that this was operator error and not a faulty tank. Thanks to ALL for your help/suggestions!
One final question: when using the longer wick, I used cotton instead of rayon. I am wondering if it's possible that rayon wick contributed to the leaking?