Hi Bertie, thanks for the taking the time to help me out!
PS, could you clarify this in terms of distinct bookings rather than TP runs, as it is not clear to me if you mean:
1) A single booking, in which they cancelled (at least) 1 sector.
2) A "TP run" consisting of 2 bookings, one being the run itself and one being e.g. positioning flights where only 1 booking has been affected/cancelled while the other is/was OK.
I had two bookings for the TP run, A and B, which were 240 TPs each. First, they cancelled two legs on booking A, so I rebooked both A and B (B for convenience; references stayed the same because I rebooked using FTV). They then cancelled a leg on B. Since they cancelled one leg on both A and B at different times, I'm not sure if I can claim 480 TPs that way.