BTW: I was never comfortable with the text "if this is your revealed plot card" - is FFG trying to imply something other than your current active plot card - i.e. it only applies during the standard plot reveal step?
I've assumed not but am not certain
I have to run to training shortly, so I will only address this...
The reason that text exists is so you don't create infinite loops of triggering other used River plots that have the ability to trigger other used River plots that contain the same text. It's limits you from triggering one of your used River plot cards from the currently revealed River plot. Otherwise you could use the same used River plot to trigger itself over and over and over again. Since you can only have one revealed plot card, you can only trigger one used River plot "when revealed".