I feel old all the time here. I've got one of my junior team members too, she's 17. Which is what happens when you put together a team on the fly when a villain attacks during the after-school rush.
People do disappear. The running theory is that we go back to the point in time we came from and don't keep our memories, though sometimes when people come back here after the first time they get the memories back.
I know, right? The teenage one is, weirdly enough, relatively responsible. He's been here even longer than me though, I don't know if that's changed anything. I know I'm a lot less stressed out these days.