
Because it's not Ciel's room in his dream. His room only has one window: http://www.mangago.zone/read-manga/kuroshitsuji/an/manga/kuroshitsuji/v18/c108/pg-24/

I didn't notice before but besides the thing I apointed there is the hairstyle.... http://www.mangago.zone/read-manga/kuroshitsuji/an/v18/c093/pg-11/

There's this too http://www.mangago.zone/read-manga/kuroshitsuji/an/v18/c099.5/pg-25/

OMG JVNFJVDNFJV this new thing you pointed are vjnfkjdbnkfbg I hadn't notice them! But now that you point them out I feel stupid
Did you realize that in this http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji-chapter-31.html/29/ and this http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji-chapter-32.html/2/ the hairstyles are diferents?? (I sound crazy) but i feel like the one from the first link is our Ciel (the one with asthma) and on the second link is the twin

btw, this is the one that created the rumor http://www.mangago.zone/read-manga/kuroshitsuji/an/kuroshitsuji/103/pg-5/

Another super clue is this, well I think... http://www.mangago.zone/read-manga/kuroshitsuji/an/v20/c106/pg-2/
Ok, this may be somewhat considered a spoiler or maybe not but just in case:
IF YOU HADN'T READ THE MANGA DON'T READ THIS.
Or do it if you don't care but I've warned you. I just seek answers.
It has been hinted that Ciel had a brother and some say it was a twin, anyway, I was rereading this and got to the wolf and witch part, but well when Ciel gets ''sick' and has his mental-breakdown he start remembering things from when he was captive and talks about someone who was with him http://www.mangago.zone/read-manga/kuroshitsuji/an/v18/c090/1.html/pg-16/ buuuuut I don't think the one shown is Ciel... and then he has that internal dialog with 'himself'' but the other doesn't have the mark of the pact between Ciel & Sebastian http://www.mangago.zone/read-manga/kuroshitsuji/an/v18/c093/pg-11/ and then at last we got this http://www.mangago.zone/read-manga/kuroshitsuji/an/v18/c095/pg-5/ which makes you think he talks about himself sacrificing his soul but what if it isn't........ what if it's the other, the real Ciel......
And maybe Undertaker (most probably) knows all....sooo is confusing and could be wrong but since that ''he may had a twin theory'' exists well it could be