Formula is =Sum(D38)/Sum(C3:C8)

Steps: Copy Formula
Paste to cell below

Problem: Formula drops the cell address "C3" and "D3" but properly added
the cell address "C9"and "D9", i.e., when pasted formula looks like this;

=Sum(D49)/Sum(D49)

I've looked under the Excel Options but can not see anything that is causing
this to happen.

Thanks
--
kesitton