nsuser,

How have you perform your restore/recovery? Are you sure you restored all the files from the same backup? Have you also restored your controlfile from your backup (not very good idea if you have usable current controlfile, but must be done under certain circumstances...)? It seems to me that (at least) your system01.dbf datafile is from a backup taken later than your backup controlfile or smth simmilar... Please provide all of your steps when performing restore and recover.