Double fouls are clearly defined. Being required to report a double foul when conflicting signals are made, even if one offficial is willing/anxious to yield, is not stated ANYWHERE.
Multiple fouls are clearly defined, by both rule and case play, but nobody likes multiple fouls............
Back to the OP: This is not about rule wording or interpretation, it is just a question of a really close call.
Three points of view on a play like this:
"Could have gone either way."
"Good call, ref!"
"The ref screwed us!!"