I've been looking back, and will keep trying, but it wasn't a telephone game operator misunderstanding on my part that I had seen in writing on MSM website that JB (MB's sister) said she had seen the same blue car there on another occasion around the same time of day -- it always stuck with me that it could have been their usual meet up place, but I can't find it now. I think it was in the extended interview transcript of MB interview video that was something like 17 minutes and was transcribed, but with some errors, so maybe that was the problem.
Most of the articles now just say JB says she saw the blue car there before LE arrived, and she thinks along with her brother that it was moved further off the road from where she first saw it. Anyway, I agree it would be nice if we could find a link to her actual statement, and will keep searching.