'Poets laureate'? 'Court-martials'? The curious history of postpositive adjectives in English.
There, there. We'll sort it out.
Why don't they call it the Merriam-Webster comma?
Why does it sound strange to say 'funner' or 'funnest?'
Is it all the same anyway?
Is there one standard way?
A simple way to keep them apart. (Most of the time.)