Good morning all. I just wanted to add to this thread that I am also affected by this too. From reading as much as I can about the issue, I am still of the impression that I entered into a contract with the airline. Human error, trying to pull a fast one, 'I should have known', technical glitch and the rest - non of those excuses wash with me.
They offered the flights for sale (during an actual seat sale), I accepted their offer after reading their T&Cs, they accepted my payment after checking I had the necessary funds, allocated me my seat, issued me with a receipt, and an electronic ticket. Nowhere that I could find in their T&Cs does it say that they can cancel individual bookings.
Perhaps if the flight had been cancelled, but in that case I believe I am entitled to and alternative flight, or a refund. My choice. These flights weren't cancelled. If the problem is with the scheduling as per the subject of their email then, again, offer a different flight. Problem with the seating been overbooked or whatever - offer me a different seat on that flight, or a seat on a different flight, or a refund. Don't just cancel the booking.