Hi Rebecca, It looks like you're doing exactly the right thing, and it should be giving you what you have asked for, but it obviously isn't at this time.
I have set the same settings and it works for me.

However, I wonder whether the Diglot setting had earlier been enabled, and it has tripped something up in the settings.
Here is a temporary workaround to try resolve it:
a) On the Advanced tab, enable and edit the ptxprint-mods.tex file:

b) Paste in these settings, save the settings and hit Print:
%% Even Header
\def\RHevenleft{\rangeref}
\def\RHevencenter{\empty}
\def\RHevenright{\empty}
%% Odd Header
\def\RHoddleft{\empty}
\def\RHoddcenter{\empty}
\def\RHoddright{\rangeref}

If this still doesn't work, then please create and send in an Archive .zip file using the email address mentioned on the Help tab.