Did you solve the complete issue with publishing to the store or did you get as far as I did?
Have not tried release to store yet, wanted to fine tune for the Windows10 Universal App release.
Managed to build and run in vs but still having several issues:
Can't run app via VS in full screen
I wonder if this is still using Edge (which doesn't have full screen option) to run the app.
Can't run Deployment Package
When I build a deployment package for testing, and then install the app via App-AddDevPackage the install occurs without any issue, but there is no App launch icon to be found in the start menu.
In game purchase doesn't work now
Have not looked at this in real detail yet, but the project I am testing has already been released on Windows 8/8.1 - Just doen't work the same when built for VS2015.
Bit short on time to look at all these new unexpected issues at present...