I actualy have been checking every few weeks. I found out the change of time, but didn't notice the change of aircraft. If I had noticed the change of craft, I'd call and ask about the seating, before getting the notice.

Still, 2 months after the change of aircraft (and the seats must had changed at that time too), before sending notice out, is quite late. Everything is computerized now. So instead of sending notice of change out, 2 months later, they can set it to something like 7 days later.

I had a recent booking thru expedia, for CO flights. Then about a week later I got a notice from expedia about a change of time, which is just a few minutes. No other change. So CO and expedia, notified me of the change, no more than 1 wk since the change. If CO can do that, AC definitely can.