For anyone interested in the BD trial transcripts and/or the recorded interviews, there is a stickied thread here on the forum.
http://www.websleuths.com/forums/showthread.php?298294-Documents-Brendan-Dassey-*No-Discussion*
Jodi testified on Day 3. She said the bedroom was arranged differently before she went to jail in August, 2 + months before October 31st. Other reports show that she went to jail around the 15th of August.
Wiegert testifies on day 4, 5 and 6. On Day 5 I was able to find a part where he is discussing the bedroom furniture. From what I understand, because we don't have the visual of the pictures they were showing, they had an exhibit made (like the cartoon one's in SA's trial) that combined what Jodi and what Brendan told them, apparently they didn't match either.
So I still don't get how it is "proven" that SA moved that bedroom around between Monday and Friday. I guess if you believe everything in BD's statements, that is one logical conclusion. However, if you don't, and I don't, then it helps prove that Brendan was not in that bedroom on Monday October 31st, 2005. JMO
Ultimately, I don't understand what the big deal would be anyway. Even if he did move stuff... the bed frame was still there. The mattress was still there. The bedding was still there. The carpet was still there. The walls were still there. The desk was still there. The nightstands were still there. The guns were still there. The mess was still there. You know what was not there? Teresa's DNA. There was no marks on the bedposts where she was supposedly handcuffed, no blood, no dna, no hair, nothing.