The Push-up element almost works

Firstly, thanks for this plugin. It works so much better than others I’ve tried and it’s very straightforward.

Summary: So the problem I’m having is with the push-up element. It almost works but it’s like it doesn’t quite understand where the footer starts. It usually overlaps the footer a little, but in some cases, it overlaps a lot, completely, or not at all depending on the situations mentioned below.

Note: I’m using #footer (but I’ve tried the #footer-black and #footer-big and they all worked the same way).

1. I can get the sidebar to recognize the footer correctly only if I reduce the size of the text/images in my browser (command -) to something so small I can barely see it. But if the text/images are larger (command +) then the sidebar overlaps. I can’t see the tiny text nor can many of my viewers so that’s an issue.

2. The sidebar also overlaps the footer completely when I shorten the height of my screen or if I split the screen (which is basically the same thing).

3. Browser dependent: not surprising but thought I’d mention it. It looks best in Safari (over Firefox and Chrome).

Thank you for any help you provide.

The page I need help with: [log in to see the link]