Why the Wait in the Kitchen?

[bohcoo]

No: HPFGUIDX 82325

OOP, ch. 22, page 476, American Edition

The scene:  The Weasley children and Harry have just arrived via 
portkey at Sirius's kitchen after Harry's vision of Arthur's attack:

"'Hang on, you can't go tearing off to St. Mungo's!' said 
Sirius...'And how are you going to explain how you knew Arthur was 
attacked before the hospital even let his wife know?'

"...'It matters because we don't want to draw attention to the fact 
that Harry is having visions of things that are happening hundreds of 
miles away!' said Sirius angrily. 'Have you any idea what the 
Ministry would make of that information?'

"...'Listen, your dad's been hurt while on duty for the Order and the 
circumstances are fishy enough without his children knowing about it 
seconds after it happened, you could seriously damage the Order's --'"


Um-m-m. . . . I think that cat's already wa-a-ay out of the bag, 
don't you?


OOP, ch. 22, pg. 474:

"There was a flash of flame in the very middle of the office, leaving 
behind a single golden feather that floated gently to the floor.

"'It is Fawkes's warning,' said Dumbledore, catching the feather as 
it fell. 'She (Umbridge) must know you're out of your beds...Minerva, 
go and head her off -- tell her any story -- '"


Umbridge, the mouthpiece to the Minister of Magic, knew they were 
gone before they even left Hogwarts' grounds. And you can bet Fudge 
heard about it before they touched down in Sirius's kitchen. 

So, then -- why the big speech by Sirius? The mere fact that they 
were all standing there in front of him should have let him know that 
everyone already knew that the children knew, "seconds after it 
happened..." If this could seriously damage -- anything  -- to do 
with the Order, why did Dumbledore whisk them away like that? It was 
end of term -- all he would have had to have done would have been to 
wait until the next day and everyone could have left without raising 
the first eyebrow. They were receiving almost minute-by-minute 
reports from the travelling portraits, Everard and especially Dilys, 
so they didn't have to sit and worry without any news.

I know that when a loved-one is hurt you want to be at their side as 
quickly as possible, but it just seems that Dumbleodre was a bit rash 
in sending everyone off in the middle of the night like that, 
especially with so much at stake. 

This whole sequence of events did not make sense to me. Can anyone 
help un-addle my brain?

Thanks,
Bohcoo