Jquery Cycle 2 cycle-next and cycle-prev firing twice

Jquery Cycle 2 cycle-next and cycle-prev firing twice

Hi all, 

I have a simple cycle 2 (version: 2.1.5 build: 20140415) slideshow that for whatever reason the next and prev functions are firing twice on a single click:

<ul id="hero" 
 class="cycle-slideshow"
 data-cycle-slides="> li"
 data-cycle-prev="#slide-back"
 data-cycle-next="#slide-next"
 data-cycle-swipe=true
 data-cycle-swipe-fx=scrollHorz
 data-cycle-fx=fade
>

Console:

I've used this method on another site exactly the same way and it does not do it. The only difference is, I have a second slide show on the page that is using the carousel:


<div 
class="carousel responsive advertisers slideshow cycle-slideshow" 
data-cycle-fx=carousel
data-cycle-timeout=3000 
data-cycle-carousel-visible=5 
data-cycle-carousel-fluid=true 
data-cycle-slides="div"

> 

However, even if I comment out the carousel and the supporting js, it's still has the same issue. Thoughts?