Graphic glitch on Sandbox page

Does anybody know what causes the glitch with ghosted empty script slots in the API sandbox page?  I have a process now of creating sessions from scratch and have made 2 sessions just fine in this instruction process but in this third run of following the exact same process in between adding two of The Aaron's scripts the sandbox page has glitched out.  Is this glitch a sign of corruption or is it just aesthetically displeasing and nothing to worry about?  I cannot get around this, it just refuses to install any other script without the large gap.  

Aesthetically displeasing and nothing to worry about. It's likely a CSS display quirk. I have noticed the gaps on some browsers/platforms, but not others.

I believe this is because the World image is 1 pixel taller than the text, which makes a little lip that the floating tabs get stuck on.  I use a local CSS style to reformat all that to a standard height to avoid the issue (and do other things...)