I sort of understand the code for "read more here" but it seems to appear on ALL my posts. So here's the thing: if you click on the link and more appears, groovy. If you click and nothing more appears, it's because it was a short post. Like this one. It's short. But the one below? Click on the link and a lot more will appear.
So I suggest you try it on all my posts, because I'm too damned confused to fix it.