If my theory is correct and the t-shirt belonged to the killer it leaves the possibility that other items were to.
This would explain a lot.
Definitely explain.
1. The change in description from the initial blue jeans/blue hoodie to the clothes found at the crime scene.
This was AB's initial description, which JuJ appeared to agree with because she had no idea what Jodi was wearing. But it's also close to the description of the school uniform colours for Newbattle High, which was literally a few yards away from AB's claimed sighting - there's really nothing to say this sighting was of Jodi.
2. Why the bra was not contaminated by Jodis blood.
That's an odd one, I agree. There was a "contact" stain on the clasp area of the bra - I can't remember if this was claimed to be Jodi's blood or a "no reportable result" but I think we'd have to conclude that it wasn't Jodi who deposited that stain, especially given the pristine nature of the bra when it was found. Also, and this has always seemed strange to me, the other clothes (underwear, t shirt, hoodie) were "strewn around" - basically just thrown down wherever they landed, but the bra was neatly folded.
3. Why no one was ever seen covered in blood from the crime scene.
It would be one explanation, yes. But the network of tracks and cycle paths in the area mean the killer could have travelled a fair distance without ever emerging onto "public" areas. Rape Kit man Allan Roberts, for example, was claimed to have admitted to Jodi's murder while he was on remand awaiting trial for an attack on another woman in Musselburgh. It is possible to get from Easthouses to Musselburgh without emerging onto proper roads or paths, simply by following the river.
4. The over emphasis on the borrowing of clothes between siblings.
Again, the whole borrowed clothes thing is very strange and definitely seems contrived.
5. The DNA samples of blood and semen from an identified male.
There's something intrinsically wrong about the way this was explained away - what police force, in a massive murder investigation, tried to come up with "innocent explanations" for this? Some of the other recovered partial DNA matches, however, do not fit this individual's profile, so there would have to be an explanation for their presence.
6. The t-shirt not being cut at the arms to allow removal.
Not sure what you mean by this- I can't remember exactly how the t shirt was cut, but from memory, it was an upside down L shaped cut - again a strange thing to do if the cutting of the t shirt was intended to aid removal.
7. The lack of blood on the torso if the killer realised that had the victim worn the t-shirt then front and back would be covered in blood so possibly used the t-shirt to clean the body.
Yes, but I'd have expected smears to be left behind - there were none. The torso was completely blood free.
Potentially explain.
1. Why AW took to washing the day after her granddaughter was murdered and some of those clothes that were washed belonged to Jodi
Potentially, yes. AW doing the washing meant that SK, JF and JoJ's clothes were all being bundled together with all of the females in the family, so any cross-contamination of any items would have an innocent explanation.
2. Why Jodi was intent on seeing Luke earlier than was their normal routine.
We don't know that she was. According to JuJ, she was telling Jodi to be quiet, shoo and go out around 4pm, just after Jodi came in from school. But she also said originally that Jodi left around 5.30, before changing the time to 4.50. Luke said Jodi texted that she would be down "later."
3. Why all the clothes at the crime scene appear to be linked by singular sperm cells.
Not all the sperm cells have been proven to originate from the same source, though.
Loosely explain.
1. If there was a clear and present danger to Jodi could stocky man have been sent to protect Jody and not as thought be a threat to her.
Depends who stocky man was. If he was unpredictable, that might not have been the best idea?
These are just my immediate thoughts on your points - as always, I'm open to any new thoughts or ideas that might lead to some understanding of what really happened.