@RumplesGirl, maybe u can confirm, but i guess that line about not cannon from Adam comes, after some CS fan complain how deleted scenes contradict the show, bc she says that one of her friends got the DVd already and says one of the scenes, Emma says to Regina that Neal supported her going to the UW, when the scene on 512 didnt show that.
If that is really on the scene, so maybe being caught in a retcon of a previous scene, may have made Adam saying that the scenes are not canon, bc having Emma saying” Neal`s greatest gift was giving his blessing to find hook in UW”, when was the opposite of what he said, im actually happy that was deleted and is not canon.
Also, means that in previous DVd, many CS and hook scenes besides the jello are also not canon.