Here's a picture of what's going on, easiest way to show you.
You can see that after the first two killmails, it no longer aligns correctly. Now, since then, I've imported other mails and now the first 4 align correctly, and the last one doesn't. It's the kill by "boogerman" that's causing the problem, as soon as that one drops one more to 5th, the issue will stop showing up. Also, it's only doing this in IGB, not in chrome out of game.
This isn't a big deal, but there's something about that kill that's causing it to mess up, and if it does it with one there's probably a small subset of kill types or something (maybe podmails cause that?) that all do it. I'll try to update if I find more.