After speaking with OP, and going over things.
I can now say that it was not done to cheat anyone or scam or what ever word people want to use.
It was a error that occurred in the system itself.
OP now realizes that this type of thing will happen and has changed the way the jackpot is run.
As I stated several times I never thought it was malicious at all,
And OP relized it after speaking with him and he fixed it right away.
And for those who said I was mad because I lost get a grip on things.
It was you all that were effected without even knowing it.
But OP has fixed it and I do not see any future problems with his site and how things are run.