Its most likely your browser is caching klventuresllc.com and
www.klventuresllc.com as different sites. Go to klventuresllc.com and hit f5 a couple times and it should update.
While having or not having www in your domain name will effect cookies, but its because your browser is finding a different in the domain names the cookie is for.
www use to have significance, but at this point in time its in use by convention.