Sure, odds have been strange for that game but since Netherlands have been playing very effective so far (not many attemps on target), maybe it's for a time when Netherlands are less lucky. But turned out to be a good bet, Netherlands won 3-1 against USA.
In addition, odds are looking interesting for Japan to qualify against Croatia, I don't know why bookmakers are favoring Croatia so much. Croatia vs. Belgium has been very lucky for Croatia...
Croatia is much better than Japan and that is a sure fact and I fully agree with the bookies,Japan beside the game they beat Germany they did not show anything else as they lost against Costa Rica and Spain in 99.99% of the case let them win trying to make also Germany fail to go further than the group stage.Croatia on the other hand is a team much more solid with a lot more experience in such competitions than Japan and their coach is one of the best,he was also the coach of a team I love here in 2007-2008 so I know for sure to bet on Croatia on that game against Japan.