We might as well change the RETURN to 0 on lose events but this has been the part of whole Da Dice experience lately.
For instance, ALL BETS tab is propagating very fast, while focusing only on RETURN column and with help of colors, its is easy to see what people are losing or winning.
You should rename the column to be 'PROFIT' and show the profit or loss. That makes much more sense.
In your example, at 2x, a 1 BTC win would be shown as a green 1 and a 1 BTC loss would be shown as a red -1.
It makes no sense to show green 2 and red 1 when the bet is a simple 2x payout, 1x profit deal. Either show return (2 or 0) or profit (1 or -1).