Changelog:

• Fixed problem when trying to hide a recipe.
• Added an option to prevent crafting with items without metadata. This will also stop vanilla recipes that use the same items and pattern, regardless of whether metadata is set on the custom recipe or not.

Thanks to @pixel,@charlyg31 and @yesyukiuniverse to the bug reports.
And I strongly recommend anyone that got problems use the debug options in the config.yml. That will help me to fist find the problem and also let you know what happens when a recipe don't work as you planned.