WotLK Double stacking devotion aura

[mrburns]

So, there were 3 paladins in a rdf hc group, all lvl 80 obviously, me + tank + healer.
I had ret aura and besides mine I saw a double devotion aura. The icons were very similar but a bit different. One tooltip said +1205 armor (normal non-improved aura) and second was +1200 armor.
Checking my armor - I had just over +3000 armor in total, from improved devotion aura of the tank (+1807 armor, tooltip does not reflect that) and from the second unknown aura of +1200.
I could not switch to devotion myself - more powerful effect active.

How is this possible?

I have never seen more than one devotion aura and I cannot activate an aura of lower rank myself, only rank 10 (max at lvl 80) works.

[Persivaln]

You were in Caverns of Time with Arthas. He projects his own aura, nothing strange here.
Case closed

[mrburns]

It was rdf hc in Ahn'kahet: The Old Kingdom

Pretty sure it was two auras from two paladins, tank + healer. And I saw the +3000 (a bit more) armor on me - tested then outside with tank spec etc and best I could do solo is +1807.

[Mercy]

Perhaps it was two different ranks from each of the paladins?
Weird, though.