Unless I'm mistaken, Don't Look Past Me has appeared only on two "official" band releases: the I&W demos album released through the YtseJam Records online store (with Chris Cintron singing) and the Cleaning Out the Closet fan club CD (I don't remember a CD with Lifting Shadows, so I'll have to pull that out and look!). To Live Forever was also on both of those releases and has had a couple of truly official releases as the B-side to the Lie single and on the "Greatest Hit" compilation (and maybe a couple others that I can't recall). It was also regularly (I think) performed during the I&W tour legs (and maybe also sometimes on the Awake tour?).
As I mentioned earlier in the thread, had I not looked at the set list in advance, I wouldn't have known what DLPM was when they played it, and my point (same as what Ben just wrote) is that maybe they should have explained what these songs were (maybe they did at some other shows, but not at the LA show).