Vilas, I agree the perfect approach would have us fly the "When flaps are at two gear down. When gear is down flap three" procedure. But we know the real world is not like that, either through omission (as above) or ATC demands.
But does your A320 FCOM have the note in italics about extending the gear after Flap 2 to reduce speed as I mentioned above? Before the "When Flaps are at 2" procedure?