Hi Jennifer,
The chaise on the left side was the version Costco offered back in July 2013. That is no longer available. We first published the post on July 7th, 2013 and that's why you see the photos of the chaise on the left.
This time, in January 2014, the version offered has the chaise on the right side.
Costco only offers one version at a time probably to avoid confusion. Maybe they'll bring back the left chaise in July (?).
Hope this helps,
Olli
