Excel Circular Reference problem

The attached file shows a circular formula that will work for a few days and break for a few days and re-fix it's self. Its a never ending battle. I would really like to make it stop breaking but I cant seem to figure out my issue. Nor can I figure out why it would work only half the time.

When I start typing in cell D6 it should auto populate the other cells in the row except E6. E6 is manually inputted as well.

I need to keep F column a time stamp.

Every time I open the workbook I get a notification: Circular Reference Warning...

anyone have any ideas?

thanks,