Pay to blog problem with template blogs (Pro Sites)

Hi,
I'm using Pro Sites with Pay to blog activated.
Everything was fine about this but recently templates blogs became unavailable.
You can have a look at this and select any model to see what I mean:
http://monsitedentiste.com/creer-site-cabinet-dentaire/
What can I do to ensure all template blogs will stay available forever?
Thanks!
Best Regards