"This place is basically a dimensional, temporal bubble. It takes us out of the timeline, we live here for awhile, and then it sends us right back to the point we left from. Occasionally, it decides we're awesome enough that a repeat is necessary." Claudia gestured to herself, a half-chewed twizzler (still her first - they were Myka's twizzlers and Claudia had other sugary items of her own in her room) still in one hand. "I was deemed a necessary case of 'repeat.' Sometimes you remember things when you get brought back about being here the first time, sometimes you don't. Pete was here for awhile, but was sent back to home, to our timeline. He hasn't been brought back."
"And March was an invasion of cannibalistic creatures which had, actually, happened once before. But also like last time, at the end of the invasion - everything went back to exactly like before the invasion." Claudia decided to try to handle the brunt of the explanation and figured that H.G. could explain the finer details where she saw fit.