Sorry for the mid-week hiatus in email replies. Turns out that running the Heads’n'Tails match this week produced a series of problems that took quite a while to fix. Most importantly older matches were being dropped from the heads and tails reports. I think this is because there is a cooling off period that stops us looking at recently modified records.
Anyhow, I have tried to put together a work around but let me know if things don’t seem quite right.
Steve