Is there a bug of solidworks 2010 sp0?

When i save solidworks file to vault, there's properties of file, and i can change author (created by), an can even change created date.....

Is it a bug of solidworks 2010 sp0? How can i fix it?

If i upgrade solidworks to 2010 to sp5, will the bug is fixed?

Please answer my questions. Thanks very much.

SolidworksGeneral