Slider not working/text stack

Hi all, I’m new to WP and am maintaining this real estate site (deCondo theme) for a client;

http://www.charactercorner.co.nz

I’ve got 2 posts in the ‘slider’ category but as you can see, the slider doesn’t scroll through and the text from each post stacks up/overlays in the slider.

I’ve searched the forums and tried various suggestions with no luck. I’m sure I haven’t changed any code anywhere so not sure why this has happened. I want to feature more properties in the slider but am waiting until I resolve the issue.

Thanks in advance.