Problem With Menu Overlapping

WP 4.0. THEME is 2014. Using the “Tribulant Slideshow Gallery“

My website is: https://www.62tigers.com/

Here’s the problem: Visit the homepage and click on the “Titles” menu button until a list scrolls down. Notice how part of the slideshow feature overlaps my menu dropdown selection.

I’ve tried creating a div around the slideshow and using z-index. I’ve tried using z-index for the menu itself. Nothing is working. I’ve tried deleting and re-creating from scratch.

I’ve never encountered this problem before and it seems like a simple fix, but I’m hitting a wall. Any help would be so appreciated. Thank you!