PG's not consistently in their own section - or no they appear in "See also" if they use the same PG template?:
I think they only appear in "See Also" if the new PG you're making overlaps the references covered in the old PG. For example, if I do a PG on Ruth 1:2-5 and add some notes (to make sure it's saved), and then run a new one (with the same template) on Ruth 1:4-6, it will find the previous one and show it in "See Also." But if I run a new one on Ruth 1:6-7, it will not find the Ruth 1:2-5 one, because the references don't overlap.
That would explain why Jeremiah 17:5-8 is not being found, but not why the 2 Maccabees 2:19-32 PG is not being found, if indeed it is not being found. What reference pops up when you hover over the link "My Passage Guide" next to "See Also"?
I wouldn't expect the saved 2 Maccabees EG to come up in "See Also" when you run a PG. The guide template has to match exactly.
And I'm not sure about why the "Cycle C: Advent Sunday" PGs aren't showing up. What lectionary do you use? And what were the readings for it. In neither RCL nor the Catholic Lectionary do the Advent 1 readings for Year C overlap 2 Maccabees 2:20 at all. So I wouldn't expect those PGs to show up either.
So if the one PG that does show up for you in "See Also" is the 2 Maccabees 2:19-32 one, which I'm guessing it is, then I think Logos is behaving "by design" -- not that the design is very helpful to us in finding old PGs, but that's another story...
I think they only appear in "See Also" if the new PG you're making overlaps the references covered in the old PG.
For the problematic PG I used the range Gen-Rev which should overlap everything ... I suspect you are correct that the PG template must match. That creates an interesting work flow problem.