There are few reasons for manual withdrawals,
1. Bankroll issue, which i am hoping will be solved tomorrow (sunday.)
Does that mean you are insolvent? You should never accept bets that you can't pay out, especially with gambling where you can't hedge. Why did you decide to let people win more than you have? Also, did you really not have more than 0.013
BTC?
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.
Okay, that's fair. You shouldn't take more than 1 days to check over everything though, how hard can it be to make sure that all bets have different nonces/have the correct payout?
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.
Surely your starting "small" bankroll is at least 0.1 BTC (1x kelly for bet of 0.001 BTC) , and therefore enough to pay his 0.013
BTC withdraw?