I spotted this while I was planning on constructing a Parasite Eve timeline page.
Apparantly Maya and her mother died whilst she and Aya were only 5. This does make sense as Maya's "ghost" is about 5-6.
Now heres the problem: Melissa Pearce was 5 when she recieved Maya's kidney. Melissa is now 31 whilst Aya is 25. The problem is when Melissa was 5, Aya and Maya wearnt even born. As Aya is 6 years younger than Melissa that would mean Melissa was 11 when she recieved the kidney. This is definately a bad logic error.