I'm often finding myself modifying past blog posts. So if you saw a blog post a month ago, you might come back and find that there is a whole bunch of new stuff in the post.
Sometimes if I have a whole bunch of new info, I'll make a sequel post. But if I have little dribbles and bits to add, I'll just sneak stuff into old posts. Sometimes the dribbles accumulate to the point that maybe they should have been a whole new post, but since I added them a little at a time, they stay where they are. Lately I've been consolidating some similar posts into one big post, too. That's just the way the cookie bounces.
"L'arte non è mai finita, solo abbandonato"--Leonardo da Vinci