Yesterday I booked one of AC's very attractive international fares and as usual made my seat selections: forward "preferred" economy cabin, aisle seat in the centre block one or two rows from the bulkhead (best chance of having an empty seat next to me). However, after confirming the seat selection on the closing screen, the seats that shoed up were completely different. So I tried twice more to change them to the ones I wanted, but still nothing happened.

What's going on with AC's seat booking software? Other than calling reservations (and paying $30?) how can I get my selected seats?

Anyone else notice this problem on their bookings yesterday?