Hello! I know you're away but I'm still sorry this took me a minute to get to. Here's a solution (or at least the start of a solution) to the sticky entry problem.

First thing, go into the sticky entry's code itself and add this in to the very first line of code: class="stickyCustom"

It'll look like:
div class="stickyCustom" style="...

Then you go into your layout's CSS and add this bit to the bottom:
@media (max-width: 1000px) { .stickyCustom { flex-direction: column; } .stickyCustom > div { margin: 15px auto !important; min-width: 250px !important; } }

If you feel like it's adjusting to a single column style too soon, you can change the "1000px" down to something like "800px" or so. Anyway, give that a whirl when you can and let me know how it goes!