Follow these steps to correct your behaviour:
Open Excel in your computer.
Options is found on the Tools menu.
Select Formulas from the drop-down menu.
Clear the R1C1 reference style check box in the upper-left corner of the Working with Formulas section, then click OK.
The R1C1 reference style check box changes the reference style of row and column headings, as well as cell references, from A1 to R1C1.