fix bugs

git-svn-id: https://plugins.svn.wordpress.org/add-post-type-instructions/trunk@1042509 b8457f37-d9ea-0310-8a92-e5e31aec5664
merge it

git-svn-id: https://plugins.svn.wordpress.org/add-post-type-instructions/trunk@1042510 b8457f37-d9ea-0310-8a92-e5e31aec5664