Board Thread:Wiki-Related Discussion/@comment-2153169-20171120155605/@comment-35205453-20180513151627

In Homecoming, WRumple said "wishes can be powerful things" meaning WRealm was created by the wish and hasn't existed before which means it changed the past and its interactions with other realms.

As for the aging doesn't make sense. They probably just made them the same age to save money on makeup.