Ratings to Rhapsody

Does anyone else use the ratings feature on the clip to rate songs and then be able to see that rating back in the Rhapsody program? Usually it works fine but often it doesn’t  seem to show the same rating, especially if you have changed the rating on the clip after it was set the first time. How does the clip save the rating: to the songfile itself or to a ratings file? Anyone know how it works?  

More related question about ratings etc. Is there an internal clock in the Sansa Clip? When you are syncing files, how can the software/hardware tell whether the Sansa has the most recent change or if the PC does?  Is there a particular way that the Clip should be shut off to ensure that recently rated songs are saved to the ratings file?