You must have the created items in your backpack when you return to the character that gave you the quest. If you have sold, deleted or put these items in your bank, you cannot complete the quest. The quest is for you to craft them and bring them back.
Make sure you have these items in your backpack, and that you have the correct items and the correct number of items when you return to the character that gave you the quest.
I have made the marley bone craft, and the dog wont accept it. I have e-mailed KI twice! and no reply! I am really frustraited and I also think they should fix it or get rid of it!