User has Excel 2002 SP3

User is adding data for a given individual from many sheets into a single
sheet. Some of the formulas are surrounded by brackets {}. She writes:
"In the spreadsheet, sheet 1 compiles the numbers from the individual
worksheets. In column F the formula for Bates and many others begins and
ends with { }. However, in Flick's row and a few others the formula begins
with =. When I attempt to add rows to the sheet the rows with the { } adjust
but the rows with the = do not. "

Can anyone explain this behavior? Thanks!