Timetable
Your scheduled sessions, and how they relate to the course structure.
What it shows
Your scheduled lecture, lab and tutorial slots, generated by your institution’s administrator. Each slot links to the lesson it delivers, so you can arrive having read the material.
Timetable and gates are different things
The timetable is when teaching happens; gates are what you have to demonstrate. A gate is not cleared by attending, and a lesson being timetabled does not unlock the gate it belongs to.
Changes
Rescheduling is done by your administrator or teacher; the slot moves and its attendance record moves with it. If a slot looks wrong, that is a question for your administrator.