Corrected entry: After Evan goes back in time and accidentally causes the death of Kayleigh with the blockbuster, he ends up being placed in a mental institution for the remainder of his life. When he awakes in this timeline and asks for his journal, the doctor explains that he has asked for them before, but that they did not exist. However, the Evan that grew up in that mental institution shouldn't have any memory of traveling in time, and using those journals to do so. After a blackout, young Evan never remembers what happens during the blackout or why those journals are so important so the doctor should be hearing about these non-existent journals for the first time.
Knever
9th Jan 2014
Correction: We aren't shown everything that happens in Evan's life when he changes the past. It's quite likely that he does remember what happens after he changes the outcome of a blackout, but obviously doesn't bring it up to anybody, or else they'd think he's crazy. Being in a mental hospital, they already know he's crazy, and the journals are the only way to fix it, so of course he would demand them whenever he could.
Knever