Hi Siloynet
What is occurring? the listing issue or full width dashboard? We have tested default kleo theme and it works on our test environment. Twenty twelve and fourteen are not compatible with woocommerce unless you modify them which would be why they don’t display correctly. If you want to test with a ‘default’ theme we suggest storefront as its provided for free from woothemes on the wordpress repo.
I’m still working on the vendor store design issues at the moment.
cheers,
Jamie.