This is dvd standard – if user press “ROOT MENU” button from “film” – goto “root menu”,
if user press AGAIN “ROOT MENU” – by DVDs specification run RESUME (RSM,0) command
if you need to go from “video selection” to “master screen” you can:
1. create additional button on VideoSelection and goto MasterScreen from button command
or
2. you can change your scenarion as:
RootMenu button -> goto VideoSelection
TitleMenu button -> goto MasterScreen