The philodendron is probably a P. bipinnatifidum varient, not giganteum. Giganteum has entire leaf edges, not lobed. P. bipinnatifidum actually has many varients to it, so pick one. It could also be selloum. New varieties are always coming out and juvenile leaves can look different from the adult leaves. If you can get a copy of Exotica, you'll see how may different types of P. bipinnatidium and selloum there are.
