They used the map to slip out of the castle, not to spy on their younger brother. If you use it to get away, you are focusing on teachers and patrols, not what your stupid lil' bro is doing.
Open a thread in https://forum.scribblehub.com/forums/bug-reports.5/
Don't forget to link your story also, when doing so, and describe the issue in as much detail as possible. Include screenshots, too, if you can.
Bad idea.
Most readers read a chapter and move on. They won't read it a second time.
Post it after refinement; don't try to edit it after it's already published. You don't get to change your answers on a test that has already been graded by the teacher.