It was ACY-FLL. We ended up getting auto-assigned a row of 3 seats together, despite the odd change to the seat map. The flight ended up being pretty full (including most middle seats filled), so I'm still not totally sure what was going on with the seat map, but it worked out fine for us. I was surprised that our automatic free seat assignments also showed up in the app more than 24 hours before the flight, which I wasn't expecting. Curious to see how it works on the return trip.