Following this tutorial, I successfully tracked my footage in AE, which looked like a really good track.
I downloaded ATOM_AE2Blender27_05302014.zip from this website and ran that script successfully as the tutorial showed in AE.
When I returned to Blender 2.79 and opened up the output script AE returned, it set up a camera and my tracking scene. But when I opened up my footage as the camera background, the footage moves too slow and the scene too fast. I noticed the script put all its keyframes into 258 or so, and the video footage extended out a lot longer, up to 400 frames.
Why is my scene and "nulls" not aligned with the video footage? How do I re-align the scene to my video footage?