For some reason, Blogger is sending messages to subscribers about past posts, anytime I log in and touch anything -- even if I'm just creating a draft for a new post.
I will be suspending notifications completely (Google is getting rid of this option next month anyway) and I'll send an email manually in June to see if anyone wants to sign up for manual notifications once a month. Again, I'm really sorry for the spam. :(
Here's a pic of adoptable Finn to make reading this message somewhat worthwhile:
Love you all!