Raid timers (sometimes called "raid lockouts") are the technique implemented by Blizzard to prevent members of large guilds from visiting high-end instances over and over to repeatedly farm bosses in a short period of time. Bear this in mind if you are revisiting an instance with different raid members, as they might not always be "saved to" (associated with) the same instance as you. If you haven't got an ID for a certain instance, and you join a group with an ID for that instance, you will be saved to their ID as you enter the instance /raidinfo