Another mystery with Excel 2010.

I have an existing spreadsheet in which I had frozen first column and
top row. The freeze has disappeared and I cannot reinstate it. When I
pull down the Freeze Panes button it has only two freeze options:
Freeze Top Row and Freeze First Column. No way to freeze both.

Is this possibly connected to the other problem I had with Desktop
settings upsetting Excel? If not, what am I missing.

Dick