INT and IFF in one play

[Dutch Alex]

Hi Guys,

I just got back from a small week vacation so I wasn't able to post this question before. The following happened last Saturday to me as BU in a top league Dutch competition game. R1 on 2nd and R2 on 1st, one out. A high, really high batted fly ball goes towards F6. R1 heading towards 3th base interferes F6, who has to go forwards to catch the ball.
On the highest point of batted ball PU calls out the IFF, a fraction later I call the INT and kill the play.
Not important anymore is the fact that the ball off course is dropped. However we agreed to have the 2 outs in this play, since the IFF was called before the INT.

Did we handle this one correct? Rule set is ISF, but ASA will do as well (is more or less similair)

thnx in advance!