I'm using the C-c C-z to make what I though would be LOGBOOK entries, but
they seem to appear outside the :LOGBOOK . . . :END: block, even though my
cursor is positioned inside the block. What do I do to keep them inside?

Also, I seem to have created this header:

***               |     |              |    |

which won't let me remove it, saying it's "read only." No other entries are
behaving this way. What have I done and how do I get rid of it?