I see what happens here.
First here is Gishki Emilia's text:
Cannot be Special Summoned. During the End Phase of the turn this card is Normal Summoned or flipped face-up: Return it to the hand. When this card is Normal Summoned or flipped face-up: Negate all Trap Card effects on the field, until the End Phase. You must control another face-up "Gishki" monster to activate and to resolve this effect.
In both ocasions when you summoned Emilia she was alone without any other Gishki monster face-up on the field. So her effect may have activated upon summoning her, but was unable to resolve because you didn't controll another gishki monster when you summoned her.
Hope I helped