Stretch with overflow

[Cozmo2]

I have a CF 10 report with an Excel Output format. One of my columns needs to stretch. When I set the Fromatting "Stretch with Over to True" and the Print Control "Position Type" to Floating and the "Stretch Type to Relative to Band Height" for all the fields on my detail I get an exxtra line in my excel output when there is an overflow condition. I am including an image of the output.

What am I missing?

Thanks