To answer your questions in order:
When I checked to see which theme is selected all I can find is a place to change the theme and noting that will tell me which is selected.
From my blog log in there is no place labeled Dashboard. I can select “Manage my blog” where there is still nothing labeled Dashboard. I selected Blog Admin which does bring up a side bar call “Dashboard” from that point on your directions work and YES, comments are enabled.
Did not understand the quickedit until I discovered by accident that it comes up with a mouse over. Allow comments was checked already.
here is the URL for my blog https://aflaude.wordpress.com