Hello Jonathan,
You have inserted the two classic sliders in each of your columns. Be advised that the height of each slide are independent of each other. You may need to set a minimum height as indicated in this previous thread: Controlling Height on Classic Slider
Therefore, adding custom CSS is necessary to meet your design needs. Taking the custom CSS from the old thread, you can use this:
.x-flexslider .x-slides .x-slide {
min-height: 450px;
}
Feel free to make adjustments to the minimum height value as you need. Here are some related links for further reading, this could help you in finding and implementing some CSS fixes:
Intro to CSS - https://goo.gl/mFuWQT
How to get CSS selectors - https://goo.gl/BmoH39
Get Started With Viewing And Changing CSS - https://goo.gl/7xFhDa
CSS Media Queries - https://goo.gl/L3ZHNg
Please note that custom coding is outside the scope of our support. Issues that might arise from the use of custom code and further enhancements should be directed to a third party developer.