And when do they take payment?
The ACO do not take payment until at least Jan. or Feb. of the year of the race in my experience and then only if you agree with the ticket allocation given on their confirmation. They then give you 10 days to pay.
I have always had the tickets that I requested, whether booking during the race for the following years' event or leaving it slightly later in the year. Mind you our booking isn't as large as some. The only excpetion was this year when, like a lot of others, I was offered Beausejour in lieu of Maison Blanche, but even then I was put on the waiting list for MB and suspect that I would have got them as well had I not cancelled them due to them not being required.
Don't pay over the odds to a ticket agency - get in touch with the ACO.