By that logic, you could PC an attack that missed after you moved some other figs since that was the most recent die roll.

You need decide to use PC before you continue play. It is a *re-roll* (roll the dice you/they just rolled again), not a time reversal.

zgrose is correct.

Sorry, Supes - if they make SS, it sticks.

I contacted Psylockeslover just to make sure:
While PL's opinion is not gospel, it is close on most issues.