Stop forumla now from updating
Immediately click the Undo button on the Quick Access Toolbar or use the CTRL Z keyboard shortcut and you will notice that all of the other formulas return to their original state and that the formula in the cell of interest is now different from all of the other formulas in that column.
By Greg Harvey Normally, Excel 2013 recalculates your worksheet automatically as soon you change any entries, formulas, or names on which your formulas depend.
However, in some cases you may not want this feature to engage.
I'd been using the below pattern to limit the sum to the current month.
When you create external references (also called links), you can control whether the external references stay up to date, and when they are updated.
After switching to manual recalculation, when you make a change in a value, formula, or name that would usually cause Excel to recalculate the worksheet, the program displays the message “Calculate” on the status bar.
When you’re ready to have Excel recalculate the worksheet, you then click the Calculate Now (F9) command button (the one with a picture of the handheld calculator) on the Ribbon’s FORMULAS tab or press F9 or Ctrl =.
What if this is the default for new installs, and existing installs remain opt in?