Timing questions

[Royalfa]

I have two timing questions that I think are all but the same about two cards:

Disaster! Zombie Plague and Disaster! Magnetic Poles Reverse

Both cards refers to "in your next combat".

Te first one: Zombie Plague. I "wait" until after the door was knock to know if the card will be a monster, the current player will win if that's the case, then he drew a monster and then I play the Disaster card.

He said "This is not my next combat this is my CURRENT combat then this not applies right now"

Yesterday something similar occurs:
We are trying to prevent one player win and someone plays the Magnetic Poles Reverse as a last resource, the same came up "this is my CURRENT combat not the next one then I change sex but the -5 do not affect me"

Sounds right at least the second time but I really don't know for sure.

Lastly in the same game yesterday we know the game is over when the 7 seal is open and no one can "respond" to that, but a player has the card. "Close a seal" don't remember the name but said something like this: "if this card is draw face up play immediately otherwise you can play it ANY TIME.
Close a seal

I think this card CAN be played because of this:
1. One player plays "Prophecies of Nostradamus"
2. He wants to open the 7 seal because this way he wins
3. When a player "do something" all have the opportunity to "respond"
4. Elena responds with the above card to close a seal.
5. When the Prophecies effects resolves then he opens the 6 Seal not the 7 then the game continues.

He even say. Well then you play your card and I didn't discard mine.
She replies with "I only played because you want to end the game".

Thanks a lot for the responses and good gaming...hunting...munchkin