When I win a 1 BTC hand of blackjack, it tells me I won 2 BTC. That includes my original stake, not just my profit.
When my pig wins at 2x multiplier on a 1 BTC bet, it tells me I won 1 BTC. That's just my profit, and doesn't include the stake.
I think you should pick one of the other and be consistent across all games. I think the blackjack way is better, because then you don't have to take the stakes into account. Currently if I bet 1 BTC on 2 different 2x pigs and one wins, it tells me I won 1 BTC, which isn't true at all. I won 2 BTC in total, and bet 2 BTC, so my net profit is 0 BTC. If you're going to subtract the stake you should subtract all the stakes, not just the winning one.
A real example:
I had 3.8195 BTC. Bet 1 BTC on 3 different pigs, then had 0.8195 BTC.
One of my pigs won, with a 3.5x payout.
The game told me I had "won 2.4975", and then my balance was 4.317 BTC. So I was up 0.4975 after winning 3.4975.
There's no 2.4975 anywhere.