Well, it's pretty hard to proclaim how you're "cleaning up your life", when you're having alcohol-fueled parties in your home.
Lohan has gotten a lot of breaks - many more than I think she understands - because people keep believing that she gets it, this time she REALLY does, that she has a substance-abuse problem, and that she'll get it under control. And each time, she proves them wrong.
Hey, she might have spent the night of the party sipping soda with lime. But the image is of "If I can't go to the wild party, I'll bring the wild party to me." It's not the image of someone trying to kick the habit. And at some point (for her sake, i hope it's sooner than later) she will hit a judge who simply does.not.believe that she "gets it", and sends her to jail. Right now, I think that's going to be necessary to save her life. Certainly, her career.