I just bet 1 btc on this one:

less than 16000    1BTCDiceVit4ZoX62ksdLCbD3fsUww1hX6       24.4141%    4.064x    1.650%    98.35%    0.0010    50.0000    203.0000

which states it has a multiplier of 4.064x ..

and I only got back 3.996444 btc ...

if i do my calculations  1 x 4.064 = 4.064 - 0.0005 (txfee) = 4.0635  ..

is my math wrong?