It's complicated, but basically. As best we can tell people get returned to where they were with no memory of having been here. There are people who have been here three or four times during the time I've been here. You were here for a while too - a LOT younger, hadn't much more than left Tatooine.
So you just saw me in your perspective, but from mine I've been here nearly two years. It's actually more complicated than that, but I'll let you settle in.
There have been quite a few people here from various times in our galaxy, but I've been the only one here for several months.
They told you about the fictional thing didn't they?