Is this "remove history items after one year" Safari setting supposed to remove the item one year after it was first seen, or one year after it was last seen? I kind of assumed the latter, but it seems more like the former — about once a year, I effectively lose ALL of my history items in Safari, even stuff I just visited, which is very annoying. I changed the setting to "manually" for now, but it would be nice to know what it's actually supposed to do…