update to latest firmsware, and your issues are gone
i am also using scantohome, and hiding default template, works perfect
7830/7835: http://download.support.xerox.com/pub/docs/WC780X/userdocs/any-os/ar/WC7830-35_LandingPage.pdf
7845/7855: http://download.support.xerox.com/pub/docs/WC780X/userdocs/any-os/en/WC7845-55_LandingPage.pdf