Re: Can someone explain the unit building cool down to me?

Correct. Seths ability bypasses the current COOLDOWN. Not cap. So if you can build a unit, and plan on using seth;

If you deploy the drill pod, your build cooldown for units will restart and pop cap will update.

If you build the unit, your build cooldown for units will restart and pop cap will update, but you can still deploy the drill pod. Now deploy the drill pod to the location you desire.

So his ability bypasses the cooldowns, but the flame trooper that is added to the field DOES count against your pop cap.