Hi Michael
That seems to be the default behavior for a grand staff instrument - each stave's name is being displayed. To remove the second one for printing, delete it from the parts page and click Yes when it asks "Do you want it to be hidden here instead?". See attached images.
That seems to be the default behavior for a grand staff instrument - each stave's name is being displayed. To remove the second one for printing, delete it from the parts page and click Yes when it asks "Do you want it to be hidden here instead?". See attached images.