I've switched Blogger settings back to a pop-up window for comments, as a few folks have encountered issues with their browsers and/or settings. They've been unable to leave comments when replies were enabled.
For whatever reason, Blogger doesn't offer the "reply" option in the full-page or pop-up window settings; only when "embedded" is selected.
Hmmph. Anyway, that's the way it is, this snowy morning. Have a great day, and thanks for stopping by!