@margitlou,
margitlou -- Here's what I did when looking at the prize amounts for past puzzles to make sure I got the correct ones (because they do often have the same LC last more than 1 week). Keep one window open with the past LC's answer explanation and make sure that answer matches the one described in the news.
Example: I open the explanation for round 101, check the news for the prize. Open the explanation for round 103, check the news and make sure the answer matches. Open round 105 and check, etc. Of course you're only recording the prize amounts here.