Never keep more than 2 BTC on such sites like betcoin.tm.
Always search for scam/slow payout(s)/confiscated funds/other issues (google or here) before you deposit or keep to much money on bitcoin gambling sites.
BetCoin.TM has, in the past, paid out both large and small amounts. This time they are not. Don't defend or try to explain away scammy behavior. They deserve to have their reputation tarnished until they choose to do the right thing.