I think that chart may be wrong. I've had the Sports Illustrated salary chart for a while and both Ewing and Singleton are under contract for next season. Singleton is under a team option but I'm sure that the Clippers will pick it up because it's cheap. Here's the link for that one.
http://sportsillustrated.cnn.com/basket ... ppers.html
Also, I'm thinking that the Clippers might get some extra money next season because the league may grant them an injury exception for Livingston's injury. Because it's so severe and he's going to be out a good length of time, I believe that they could get it. The Bucks got one for Bobby Simmons (which is how they completed the Earl Boykins trade). It probably wouldn't be for too much money but any little bit helps.