Haven't followed too closely, but I think Nick's saying that the preference reversal issue doesn't apply and that's OK, because as we've defined it now 2A is no longer the same thing as a 34% chance of 1A and a 66% chance of nothing, because in the context of what thomblake said we're assuming you get the information at different times. (We're assuming the 34% chance is not for your being certain now of getting 1A, but for your being certain only later of getting 1A, which breaks the symmetry.)