I chose a few new themes from the online Microsoft store, and when I picked them, they said there was like 5 scenes with that theme. The issue, is every time I sign in, its the same 1st picture. How often is the theme picture supposed to change to a new pic?? I thought it would be with every new sign in, but its still showing that one picture, even if I sign in like every day, same pic. Anyone know about this?