A police photo in such circumstances is not a genuine record of what the apartment was like the moment Kate discovered Maddie had disappeared. In order to protect the other sleeping kids she inevitably closed the window and the shutter.
You are quite wrong
In his May 10th police statement Gerry McCann clearly states that when he rushed back to the apartment after Kate had come to the tapas bar to tell them that madeleine had been 'taken' he found the curtains, window, and shutters all open
That's how the room was, with the twins in the cots, when she left them to go and find the other adults
I can understand Kate's desperation, but why did she leave the twins and run outside? What if, while she ran outside, the abductor was waiting to take the twins? Why did she leave the twins in the room where Maddie had been taken from?
This might be simplistic, but why didn't Kate scoop up the twins from their beds and hold them tight? They were all she had left. But all she did was put a hand on their backs to check if they were breathing. Then, sadly, leave them the next day in a "kid's club"? I still don't think that the Mccanns were responsible, but they made some massively clumsy mistakes.
Probably because its extremely difficult to search in cupboards, under things, open doors etc with two two year olds in your arms. Have you ever tried it, especially in a blind panic when the focus is actually a missing child?
Are you aware of the two reasons the twins were taken later in the morning of the 4th to the children's club?
Well those reasons are that it was a more normal environment for them than an apartment block which was being searched by dozens of police etc.
And also there was no family to look after them till they arrived from England as Gerry and kate and the Tapas group were in Portimao and elsewhere giving statements for most of the day. The people who they were most familiar with who were available to look after them were the nannies in the children's club.