if I make a deposit bitcoin takes how long it would look at my account balance considering it may take several confirmed
Hold on your willing to deposit on this site till they fix the bug. I believe you will not risk your btc on a site with a serious bug where players has no chances to win a betting on one of the option to bet (tails)
This is not true. You can win also when you bet on Tail, your assumptions are wrong and based on a small sample size, worthless for any statistical model.