Newbie Apocalypse question

[Bosinchi]

Hi,
Played first game this weekend, and have a question about turn sequence that I would like to have cleared up.
Scenario 1:
Background: 6 seals are already opened
Player A kicks open door, draws a "+10 to monster and open a seal card"
Because Player B saw that someone had the ability to open a seal, player B says "before you make your next move, I'm playing a 'close a seal' card"
seals drop down to 5,
Player A goes looking for trouble and plays the "+10 to monster and open a seal card" along with the monster

Is this legal for player B to close a seal in between player A kicking open a door and looking for trouble? or does the 7th seal trigger because player A does everything in 1 consecutive motion?



Scenario 2:
Background: 6 seals are already opened
Player A draws a disaster card.
Player B uses "play this card to cancel a disaster, open a seal"
Player C argues that since Scenario 1 happened, player C can use Militia's ability to cancel the disaster before player B can play his card and trigger the 7th seal.

I was player B in both the above situations, and I believe based on timing, scenario 1 is acceptable and scenario 2 isn't, since scenario 1 is a reaction to "kick down a door" which didn't have a seal opening effect, even though I know that someone had the ability to open a seal, whereas scenario 2 was a reaction to the seal opening, which isn't allowed as per the rules.

Can someone let me know if I've missed something?