Thanks. I'll assume that was part of the design.
Yup, 30/18/18 is the correct distribution.
Era 1 simply requires additional cards (with 4 players holding the maximum of 4 cards in their hands and 4 community cards, that's 20 already potentially in use).
And because players (most likely) have cards from the previous era(s) in their hands when a new era begins, the distribution *in the deck* is more even than the overall card count suggests.
Sorry I didn't see this sooner... I have two kids now !