I do a simple formula (such as "DAYS360" to determine the number of days
between to columns of dates), it shows the correct result (i.e., "8"), but
when I slide that formula down the rest of the column, it displays all cells
as "8" (or whatever result the first cell showed). This happens with other
formulas as well; the formulas work, but the cell shows the same number as
the very first cell completed.

The only work around I have found that corrects it is to double click on the
cell showing the incorrect result (in other words, double clicking on the
formula), which hightlights the cells involved in the formula, and then
hitting the "Enter" key. The correct result is then displayed. But I
cannot feasibly do this for every cell when I might have a column of 1000+
entries

Anyone see this before and knows how to fix it?

Thanks,

Marc