To be honest, Boru, I have suspected all along that ViganĂ² was the annointer of Moran but it is not up to us to speculate.
Should be easy enough to find out by ... asking Moran. I would think he'd have some paper attesting to it. Otherwise treat as positively doubtful. He wouldn't be first, nor will he be the last, that should be avoided on those grounds. I suspect it was +Williamson rather than +Vigano, since I don't believe Moran speak fluent Italian ... but it's curious that +Vigano said "WE" were decieved, as typically you don't have two individuals involved in a conditional.
Perhaps Moran pulled some crap like my children often tried with me. Child to me: "Dad, Mom said I could have a candy bar." Child to Mom: "Mom, Dad said I could have a candy bar." Well, yes, the second statement is true because Dad said the child could have it ... but mostly just because he thought that Mom had OKed it. Then Mom OKed it thinking that Dad had OKed it. Unless you have a chance to compare notes in detail, the child gets away with it. I suspect something like that may have occurred with this guy, and that's why "WE" (plural) were decieved. He may have gone back and forth somehow and worked a slightly more sophisticated version of this same con.