1. Bankroll issue, which i am hoping will be solved tomorrow (sunday.)
2. When we started the site we had some security issues like you could place a negative bet like -1 BTC which become 1 BTC on profit, generating same nonce for every bets using continuous ajax request etc. that's why i disabled auto withdrawals. I already fixed those issues but still i am afraid.
3. When i started the site i made a wrong calculation i had a small bankroll but i started the site without any max bet limit, which was dangerous. Then some well wisher told me to set a maximum bet or maximum profit per bet limit for which i am really grateful to him.
A negative bet, like honestly really? I'm not sure what you were thinking.
That was a bug. Every new site experience issues at the beginning. and nobody is perfect. Even primedice had security issues so they lost $1.5M worth bitcoins to a hacker.
That is why a QA should be put in place before actually rolling a site, specially a online gambling site that involves a lot of money. If there is like a some software testing before the release this should have been captured as defect as fixed right away. This thing should have been avoided. I know that a software is not 100% bug free. But minor defects like what you describe is easily avoidable. A major bug is understandable, but a negative bets is totally unacceptable IMHO. Heck maybe a SQL injection would put your website in jeopardy (kindly please test this as well, I'm a software tester btw).