Having the original poster log finds on archived caches shows the owner leaving the caches as geolitter. Perhaps he doesn't want anyone to know that he did not remove his caches. He could also be someone bitter with the game.
Why were you looking for caches archived over a month ago?
The reason I went "after" an archived cache was because my gsak didn't upload the cache as archived... it uploaded it as a current active cache... I am currently working on trying to figure the gsak issue out in another post, but in the mean time, I was trying to figure out what to do about this particular situation.