They are out of sync somehow. They usually have the same info. Event the backgrouds are now different.
Try a pram reset, power off the mac, power back up holding the following keys, OPTION+COMMAND+P+R you need to press these keys before the start chime, then continue holding them till you hear the chime 2 times then release. Reboot.
Also some more info here as well.
Hope this helps
Retrieving data ...