Completely stupid inane theory to explain the copy/past of the ruins:
Maybe it isn't that a new set of ruins which look exactly like the old ones has been found but rather that the Guardians are able to bend space an it is in fact the exact same ruins occupying two different locations in space at exactly the same time...
Or maybe not, who knows...
Maybe it isn't that a new set of ruins which look exactly like the old ones has been found but rather that the Guardians are able to bend space an it is in fact the exact same ruins occupying two different locations in space at exactly the same time...