Should I launch fresh instance or restore last when app is deactivated and started again through app list?

I read a lot about application states, tombstoning and recommended practises but I am still confused

Here is my scenario

User launches app through application icon.
User then moves to next page.
User Click on Windows button.
User launches app again using application icon

What should happen here?

My second page should be displayed? because user didn't quit the app through back button
Main page should be displayed? because user launched it through app list which means new instance

MSDN says

Ensure that when your application is launched by the user from Start or the installed applications list, the user is taken to a consistent launch experience. It should be evident to the user that they are experiencing a new application instance.

Does this mean that I should launch the main page again not second page?

If yes, should my app state only be restored(to second page) when user comes to my app through back button and Application_Activated event is fired?

Solution

You should start new instance of application.

I believe this is also part of certification process.

And the whole thing would get quite complicated, because only way to ensure, that application is onpened on same page, with same data, is to save whole state into isolated storage.