I know the order at the bottom of the thumbnail is

Upvotes/Downvotes
Favourites
Comments
Rating

Ex. 39↑ 104❤ C7 E

However, sometimes after those, theres the letters PC, P, C or others. I assumed they meant "Pending" or whatever but that isnt what they mean as even approved posts of mine and others have these. Does anyone know what these mean?

P = Post has a parent
C = Post has children
U = Post is unapproved/pending
F = Post is flagged

earlopain said:
P = Post has a parent
C = Post has children
U = Post is unapproved/pending
F = Post is flagged

Ohh that makes sense. Thank you!

And C0, C1, C2, C3, etc, means there's 0, 1, 2, 3, etc, comments on the post (though hidden comments are counted even though you can't see them, so the number may sometimes be off).