Issue with site carousel and bxslider

I have been trying to track down what is causing this sites carousel slider to act very funny.

After the first slide to the left, it displays items in the list that it is not intended to.

Here is a link to the site:

As you can see, as the slider moves, it all of the sudden displays different items, then slides again and repeats those incorrect items.

Is anyone familiar with bxslider or what might be causing this error?