Two people deposited 10x the minimum deposit, I want to say again depositing more than the minimum gives you no advantage.
Seeing 0.007 btc in pot quite good number, i think you should hide that timer on top so that people have to guess when it will be stopped giving more deposit to jackpot so that more and more will keep depositing for bigger win.
That's a good idea to hide the timer, if it gets some more players I'll bring out a poll and ask if it what they want.
As for the two people who deposited 10x what they needed to if they can post here with a signed message using their BTC address I'll send it back to them. Maybe they were doing it as a donation? Who knows.