I'm sorry, but that info about DANGER ISLAND can't be right. I saw the show when it was first-run. They did not have 2 episodes of DANGER ISLAND each week; only 1. And they had exactly half a year's worth of episodes to make up the full story. When the cartoons ran out, DANGER ISLAND continued, and the rest of the show was "reruns". I cannot possibly recall this so clearly unless that's the way it was. I remember feeling 'forced" to sit thru the reruns of the cartoons as the later part of the DANGER ISLAND serial continued. The result of having more episodes of DANGER ISLAND than the cartoons meant that when DANGER ISLAND was rerun, the cartoons that re-ran with it were not the same ones seen during its first run, since they were on a different cycle!
Some years back, I saw a half-hour version of THE BANANA SPLITS in syndication. At the time, it seemed to me that the DANGER ISLAND segments were much shorter than I remembered from when it was on the network. I can only imagine they must have re-cut them for syndication. If the serial was cut into shorter segments (and it may well have been), the total would have been 52, not 36.
I'm not sure about this, but I do recall they always ran THE ARABIAN KNIGHTS early in the first half-hour, THE THREE MUSKETEERS sometime in the 2nd half-hour, and DANGER ISLAND smack in the middle. What may have happened was, it may have been split up around a commercial break at the half-hour point. This way, they would only run the title montage at the beginning (or, "every other segment").
I just checked Wipikepdia... as with so much else, they've got it wrong. They don't even spell Rockne Tarrington's name from the TARZAN series right! (It's "Rao", not "Tao".)