Question about postponed games

The settings on my pool are that you only pick three games a week.  What happens if someone picks a game that later gets postponed or suspended?  I'm assuming that they will be able to pick another game that week.  Is this accurate?  Thanks.

When the game is made up or finished, are we locked into our picks?  If someone picked the Red Sox/Rays game yesterday before it was postponed, would their pick be locked in for today?  This is important stuff.  Thanks.