Hard to take seriously a "User-Centered" article on a website that hijacks your browser's scroll.
Really sorry to hear you're having an unpleasant experience.
Would you mind telling me which devices, OS's and browsers (or other relevant info) you're using when you encounter these issues?
If you work in UX or product (which it sounds like you do), you probably know no one ships a perfect experience (in spite of our best efforts). It's not due to negligence or bad intentions.
We've run several rounds of UX testing on our site and the overwhelming majority of people don't experience any scroll-jacking. There's obviously some kind of death-combo that causes problems for some users.
So, we're neither ignoring our UX nor trying deliberately to punish you. We would be in your debt if you could help us figure out what's going on here!
I suspect it's some kind of issue with Wordpress itself... but I'm no (hardcore) techie and can't seem to find the root.
I looked into your code, and it looks like you guys use a javascript library called SmoothScroll v1.2.1. I'd suggest just removing that bad-boy. Good luck!
I'm gonna look into this first thing in the morning (it's way past working hours here in London).
I can't wait to get rid of that pesky thing :)
I wonder if the irony dawns on them at all.