That's correct. The date might be reasonable for the "temples" (which are actually pyramids), but it's inconsistent with canon regarding Atlantis. On a related note, some of the text confusingly refers to a "Temple Pyramid" when they are all temples. If I recall correctly, it should be "Earth Temple" instead.
Oh and FYI, this forum is supposed to be for errata reports; there's a separate forum for discussion.