YO 6MM,
no dumb questions there, "the dumbest question is the one that is not asked"
originally, the pictures were needed to post to get a visual on the group and to make sure no one was padding scores or actually so all can give input so a shooter wouldn't shortchange themselves.
it's nice to have, but not really required.
the weak or "support side" matches are optional, usually shot in the 4 position matches, though a viable interesting training excercize for any of the matches.
interesting to note also if you do a 100 tq4 2.5rd or 200 a21 5rd or 5x7 gong targets, you are actually shooting 2 matches within 1 target (scoring rings & hits per simulated gong overlayed).
with the price of, lack of, or conservation of ammo these days, that sort of comes in handy.
i have to admit i haven't got to shoot any of them this month due to lack of time and the above statement.
hope that answers your questions.