Kirsten has been seeing things that don’t make sense in the stitches. She sees things that are out of place in people’s memories. When she went into revenge bomber Peter Brandt’s memory in the Stitchers pilot episode, she saw a teddy bear in Peter's memories. She saw that exact teddy bear in Justin’s memory, too.
The teddy bear is most likely Kirsten’s memory, but she doesn’t remember ever having a teddy bear like that. She doesn’t remember anything before her father ditched her with Ed Clark. Why would she start remembering that stuff now?
Kirsten also tells Cameron about the photo Ed Clark left her. (The ripped photo of Ed Clark and Kirsten’s mother with the word ‘remember’ written on the back).
Kirsten was abandoned by her father when she was eight years old. Why do you think Kirsten doesn’t have any of her memories from before the age of eight?