I just now had a bizarre thought: this is the first version of the show where a contestant can play for less money in the second half than was on offer in the first.
It is indeed the first time that you could see
the same contestant play for less money the second time than he did in the first. (I'd composed the rest of the post before I realized that you were making a statement rather than asking a question.)
There have been a few scenarios where a different player would play for less in Game 2 than in Game 1:
1. On the 20K, it was quite common to see a $15/20K attempt in Game 1 and a $10K attempt in Game 2. (You could even extend this to the $5,000 rounds they played when the last game of the week was a tie.)
2. On the 100K, if the titular prize was won in Game 1, the other two players had a filler game for a possible $10,000.
3. In the last celebrity edition on the CBS 25K, teams from four soap operas played one game per day. The only way to play for $25,000 was to win a 21-21 tie. I don't know the outcomes of all the games, but that means it was certainly possible to see a $25K attempt in Game 1 and a $10K attempt in Game 2.