Jerry, here is the explanation I posted on July 13:-
Throughout the show, they play what they call toss-up rounds for a prize of $2000. In these rounds, the wheel is not spun, the three contestants each hold a buzzer. Letters are randomly displayed across the puzzle one at a time. When a contestant thinks they have identified the solution they press their buzzer which halts the game. If they are correct, they get the $2000 added to their total, if not the game resumes. So in a toss-up round, a letter that appears more than once in a solution may only be shown once, and will display as the game proceeds.
I also explained elsewhere that "Before and After" subjects .are two expressions which share a common word. Garlic Press and Press Conference.