The more I think about it, the more I'm coming around to the idea that this was Jordan's plan from the start and he never was serious about signing with the Mavs. What he wanted was to keep playing in LA, but felt like the Clippers, and especially CP3, didn't appreciate what he brought to the team. So, he shopped around until he found out just how desperate the Mavs were, promised to sign with them, and then let Cuban and Parsons crow about what an amazing deal they made by getting this top-tier player. With the clock winding down, he picked up the phone and told Doc Rivers that he was having second thought about his decision. Then the whole Clippers organization rushes down to Houston to tell Jordan what an amazing player he is and how sorry they are that they didn't appreciate him. Now, he goes back to LA a hero and the man who put one over on old Mark Cuban.
But maybe that's giving him too much credit and really he's just a flaky guy who can't decide what he wants.