This ONLY affected the BTC site and not NXT. I wouldn't have noticed the issue if I didn't always log my progress while playing. But this is definitely a big issue, especially as it could have affected deposits/withdrawals as well (i.e., someone withdrew their balance before the rollback, now they can withdraw it again).
I was just about to send you and email. I checked thed stats of Chanc3r and there was nothing to be found in his last 24 hour history. all his rolss were there. Same with the leaderboard, everything looks fine. Maybe you entered the wrong account?
And... that's embarrassing. I can't even put into words how sorry I am for this -- I was hasty to report it as if it were a big issue, it could potentially be catastrophic. You're right -- it turns out that last night, I was playing on my alt account and didn't even realize it (so all data I logged was for that one). It also explains the whole leaderboard situation (I was tracking not based on each person's individual stats, but based on relationships between each other -- the incorrect account ended up with a 30% difference, leading to the ~3 BTC claim on Chanc3r's behalf).
Thank you for looking into this, and again, I'm extremely sorry!