Forum:Dimensional fissure and Gravekeeper's servant

Grave Keeper's servant say unless your opponent sends 1 card from the top of their deck to the graveyard. he/she cannot attack. and Dimensional fissure states that if a monster is sent to the graveyard remove it from the game instead.

I want to know why this combo will stop your opponent from attacking when one card says the top card is sent to the grave yard and another removes it from the game instead. A freind and I argued that because the card was still sent to the graveyard even though it was removed instead. the cost for gravekeep's servant was activated. This combo in my oppinion should not stop the attack. But in another article it reads that four judges ruled that it worked. Why is that?

Second how do you know the top card of your library is a monster.