Asked yet again since we could not determine if they wanted us to use the Z
or Y procedure.
Why do you think they would care whether you were using IKS or the SY DME?
... the fact that he said we flew the right approach left me even more confused…
I would say his answer was tongue in cheek. He was saying, in effect, that provided your chart was current, it didn't matter which of the two you used - both were correct.