Spurious "level" tags

[cathoderaydude]

I have a very simple blog setup, with a main page consisting solely of:

====== My Posts ======
These are my posts.
{{blog>?5}}
~~NOCACHE~~
~~NOTOC~~

When I look at the generated HTML for the listing, it looks like this:

Note the empty div class="level1" between every post. This goes away if I remove the heading from the page, but if there is a heading anywhere, this phenomenon occurs - the level of the most recently applied heading appears over and over.

In my specific case, this is causing a problem for a patch I'm trying to write to add some custom functionality to the post listing. It was not an issue until I tried doing that, and I imagine most people will never notice it's happening, but it still seems to be a bug.