Of course they wouldn't remember. Myka subconsciously knew the answer to the question no sooner had she asked it. Being sent back with memories that could potentially be used to alter events. Memories of a place that shouldn't exist and doesn't on any normal spectrum of reality. It would make life all the more confusing for those sent home.
As she listened to Claudia ramble on she knew immediately that she wasn't being told everything. In the beginning she had insisted on taking things slowly and not being overloaded with information. But it was something about the way that Claudia pieced the information together that spoke volumes to her. No, the young woman that she had thought of as a little sister was tap dancing around some vital information. "Claudia please stop tap dancing around telling me something. I'm a trained observer and I can tell you aren't saying something."
Book version or not, Myka would rather Alice not turn up in the castle. The girl could be the sweetest person alive and it still wouldn't make a difference. That classic had been ruined forever by Lewis Carroll's Looking Glass and Alice Liddell.