Hunter Artifact Weapon Confusion

My artifact weapon is Titanstrike - it appears as the weapon in each of the three Hunter DPS designations and it has been upgraded no matter which - Beast Master, Marksmanship or Survival I have chosen at the time of adding artifact power. 

This is unlike any of the alt characters I have - Monk, Warlock, Shaman, Rogue or Demon Hunter. Each of those has separate weapons for each specialty - example - The Monk has Fists of The Heavens for the Windwalker Damage spec - Staff of the Mists for the Mistweaver Healer spec - and FuZan the Wanderer's Companion for the Brewmaster Tank Spec.  Each of these has completely different Artifact Power "trees" and the AP applied is specific to each spec. 

THIS IS THE ICY VEINS IMAGE FOR BEAST MASTER HUNTER  

NOTE THE 5 CIRCLE GROUP LOWER RIGHT 

COMPARE THAT WITH MY TITANSTRIKE FOR BEAST MASTER 

NOTE THE 54 IN THE UPPER LEFT CIRCLE - I have now received a message that my Titanstrike is at maximum level and the AP I have on hand cannot be applied to the weapon 

NOW LOOK AT MY ACTIVATED MARKSMANSHIP SPEC

EXACT SAME WEAPON AND AP TREE 

THE SURVIVAL SPEC TREE AND WEAPON ARE THE SAME 

So what is the deal here?  When I open the appearance window I see this 

This shows a number of additional weapon names and appearances - I no not if these are actually different weapons or if it is simply a cosmetic thing having nothing to do with Specialization as in the Monk example above; or are there more weapons I somehow missed??  I find that odd since I have every weapon for the Shaman, Warlock, Rogue and Demon Hunter as well as the Monk. 

SO I HAVE 2 VERY IMPORTANT QUESTIONS:

1) Is this as it should be?

and if it is 

2) What to do with all the additional AP acquired in invasions, Emissary Quests, and other activities so common to WOW.  I spent the time to get this character capable of doing battle and now that is done I can't use the most common reward?? 

WTF??