The only mistake you might have made there is saying
"You know it"
No, i don't know it. The question is should Paladins blessings stack?
And should Shamans totems stack?
No, i do not think they should.
And i do not know anything that would make me think otherwise.
If this is not the question, i think the question is worded very wrong.
EDIT:
If your point is correct, im convinced the questions should have been worded:
"Should shamans totems stack with paladins blessings?"
My answer to that would be yes.
Thats not the case though.
The question has been worded:
"Should Shaman's totems +(and) Paladin's blessings stack?"
My answer to that is NO