I don't know about subtle. I noticed it on my second read.

Why call it Aftermath 2? Why not just a nameless block? How is it the result of anything?

I guess I didn't fail to notice my confusion.

Dumbledore messed with the girl's mind to test if Snape was still in love with Lilly.

What I'm a bit uncertain about is the 'Ever since the start of this year' part. Has he been setting something like this up every year to have something ready when needed? More like, was that an intended implication?

Mind, the second part only occured to me after I read the reviews re Ch29 Notes.