Discrepancy with application.urls

[natea]

I'm using Oscar Commerce 0.7.1 and django-oscar-paypal 0.9, and when I follow the instructions here:

http://django-oscar.readthedocs.org/en/latest/internals/getting_started.html#urls

It says to import application from oscar.app:

from oscar.app import application

urlpatterns = [
    ...
    url(r'', include(application.urls))
]

But the django-oscar-paypal also imports application, as instructed here:
http://django-oscar-paypal.readthedocs.org/en/latest/express.html#getting-started

...

from paypal.express.dashboard.app import application

urlpatterns = patterns('',
    (r'^admin/', include(admin.site.urls)),
    (r'^checkout/paypal/', include('paypal.express.urls')),
    # Optional
    (r'^dashboard/paypal/express/', include(application.urls)),
    (r'', include(shop.urls)),

If I remove the line (r'^dashboard/paypal/express/', include(application.urls)), then the site works but when I get to the payment details page it says that it hasn't been implemented yet, and the PayPal section doesn't appear in the dashboard.

If I remove from oscar.app import application, then I get an 404 page not found error.

Is there an example Oscar Commerce site that has successfully implemented PayPal that I can take a look at to compare it with what I have?

[natea]

I found the sandbox site which explains how to set up the URLs properly.