This was the test url - The page was mostly thrown together to test the script, so not clean at all.
When you scroll the sticky element will move from the first section to the second, but for some reason lacks the smooth transition sliding between the two positions.
There may be some additional css that is missing (external stylesheet in the example?).
Didn't spend a lot of time figuring it out, but if you have any suggestions or can see something I missed, it's a great feature and would love to be able to include.
Example located here: