Dark Side Platter

I understand in general terms the idea of one or two “throwaway” panels for syndicated Sunday comics. This DSOH seems to have two separate ones. Then goes on to a main comic, which to me looks like two more disconnected jokes — first a typical short-form Horace meta joke (and pretty good!), then finally an extended narrative joke (complete CIDU!). So … what’s up with these?

Just to be clear:

A word play OY:

A one-step pun:

A typical-for-Horace signifier/reality meta joke:

And a “Huh? Wha?” narrative:

Would you cut it up differently? Or see it as more unified? Or have better explanations?