Update: the seatmap has been unavailable for at least three days since I noticed it and I called this morning to see about fixing the moved seats. The agent said the seatmap was unavailable because of an equipment change and that it was unavailable for her too and that I would have to wait until it was available but she couldn't say when that would be.

We've been hit a couple of times with changes from Alaska on this itinerary, including a schedule change that canceled one of their flights so it's been a bit of a burden to keep up with all the changes they put us through and I asked if a supervisor could help. She was able to get a supervisor involved and he was able to contact someone who was able to fix our seat assignments on the flight with the unavailabe seat maps. Now that I check it after he's worked his magic I find that the way he got it fixed was to bring back the seatmap Yeah! It's been hit or miss but this time Alaska has come through for us.

Thanks for the help travelsg!