Ok, thanks for those screenshots. Could you please try something for me? Can you go into the Jetpack page, deactivate all of the modules that you have activated, the reactivate them one by one until you find the one that causes the site title to appear. To deactivate a module, click on the "Learn More" button for each module, then "Deactivate". Also, it'd be helpful to have a list of all the active plugins on your site.
With that information, I'll be able to file the bug report. I'm sorry to ask you to do this, but I wasn't able to reproduce this result on my test site. Thanks!