Nugnug, you may have hit on something there.
YW, Jodi's cousin, lived just across the street from Gran. She lied about Jodi being in her flat on at least two occasions previously (the time Jodi skipped school and the time JaJ was sent looking for Jodi at silly o'clock in the morning because she hadn't returned to her Gran's by 10 o'clock... that was the time there was no instant search). Gran also lied to JuJ about Jodi being in YW's flat (and also to Corinne who was led to believe they were all staying over at the Gran's).
If Jodi left her own house too early to see Luke, she could have taken the same route through the complex, but gone to YW's, rather than her Gran's. YW's statements were not taken seriously by anyone (she was described as "not too bright".)
JF rubbished YW's claim that he had told her on July 1st that he was going to go to the police in the morning to tell them he had been on the path, on the moped.
YW's was the main place they all hung out to smoke weed, because they could. She was a young single mother with her own flat - no adults around to tell them what to do.
Instead of going to his Gran's, where he was supposed to be staying the night of the murder, JF left GD's ridiculously early (GD said it was because his gran was an early bedder and liked him in before she went to bed - utter nonsense, according to all of the other statements) - he went to YW's where he watched the search party leaving from the gran's house. How many people are gazing out of the window at after 11 at night?
Anyway, I digress, there is a plausible theory of where Jodi could have been if she had to "be quiet...shoo...go out" way to early to meet Luke. Looking at it now, it is the most likely place she would have gone. It is also the most likely place where the cannabis that was still in her bloodstream when she was murdered, was ingested.
Why would YW say nothing if Jodi had been in her flat? Fear? Threats? Told not to tell? (Remember, JF claimed his gran told him not to go to the police because he was on the path at the "wrong time" - the only reason he was forced to come forward, in the end, was because he and GD had been seen by more than half a dozen witnesses.)
If there were no witnesses to Jodi being in YW's flat and she was never asked the question, she may have been convinced by others that it was not important. For the record, I have never seen any statement outlining what YW did the day of the murder (who was in her house throughout the day, for example). From what I know, she was vulnerable and suggestible.
For example, she didn't know what to do about the gloves, and she didn't report them to the police. A friend, when she found out about them, told the police, and only then were questions asked about them. If the friend hadn't found out, or hadn't bothered to say, that would have been another piece of information known to the family, but not to the investigators.