@baris Okay: I'll focus on the possibility of multiple nodebb processes.
@PitaJ: Gotcha. I'm glad I put exactly what I typed so that you could point out my error. I revisited the documentation and it looks like I'm not starting the app the way it's currently recommended (via nodebb start), so, without having insight into why running node app.js might be a problem, I'm giving that a shot.
With that, the nodebb related output seems to be the same when grepping either 'node' or 'nodebb'... it shows processes for loader.js and app.js in the nodebb directory.
Anyway--I'll see what happens with today's digest. Regardless, I appreciate everyone's help very much.