Hello,
1) Can’t reproduce this error. Try to crear plugin cache and check again. Maybe your cache plugin caches the wishlist page.
2) Manage stock color via Theme Options > WooCommerce > Shop Elements https://gyazo.com/eaf45a70c7e05569f2e26408c50cafce
3) Don’t see any black line there http://prntscr.com/q5ouyt
11) Passed your issue to our developers. I’ll inform you once they find the reason of the problem.
Regards
