You are mistaken. You have confused the principle of “abrogation” with the principle of “taqqiya”. What you call “taqqiya” is actually “abrogation”. On the other hand, “taqqiya” is lying about Islam to non-Muslims or other outsiders.
That isn’t how it is described here. Is this information incorrect?
http://www.youtube.com/watch?v=Ib9rofXQl6w&feature=player_embedded