if you do that in a race then it doesn't count as a wager in the race and your wag will stop. I've tried it in tonight's race some friends mengataman this new rules in the race where po 1x down does not count anymore (cmiiw) but I have not found an explanation about this
when you bet on the banker and player simultaneously your best chance is to get po once when the player wins or draws. and get a 0.98x po when the banker wins. but when I did that with last megarace last Saturday, it didn't add to my wager at all in the race. I do not know if there are new rules in the race. may I get enlightenment