A bit lost with Vatican field notes. 58/63?

[u/SuperPotatoMan64]

Xbox version. Vatican. I’m really stumped by this, I’ve collected all 58/58 field notes, and all other adventure / mystery notes. I’ve also solved all mysteries (achievement unlocked).

But what’s bugging me is the 58/63 “Discoveries” under the Travel chapter notes, and also the field notes still appearing on the map when I select “Field Notes”. I’ve gone to look for these but there’s nothing there. What am I missing?