Digital BW, The Print

I have set up an 1160 with the Cone piezo driver. I see that even 
though I choose 1440 dpi with photo quality paper in the Epson 
dialogue box, the piezo settings remain at 720x720. Is this normal? I 
was surprised because with the 3000 the dpi setting in the piezo will 
automatically switch to 1440x720.

The version I'm using is 5.1 -- with with upgrade applied.

Many thanks,
Stan