Spread sheet calculating/not calc from opening file differently
 

WHen I open a spreadsheet with double clicking on the file icon, and change
numerical values in the spread sheet it dosen't re-calc even after hitting F9.

WHen I launch excel first then open the spread sheet the spread sheet re-calcs
automatically. Autorecalc is ON

THis is on one PC...when I take the file to another PC (on a USB Drive),
double clicking on the file ICON to open the spread sheet, it calcs
automatically.