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Re:iCloud was storing cleared browsing histories by chillaxtian on Friday February 10, 2017 @01:48AM (#13613698)
tombstones are necessary when doing distributed deletes.

https://en.wikipedia.org/wiki/Tombstone_(data_store)

Re:iCloud was storing cleared browsing histories by dantiberian on Friday February 10, 2017 @02:25AM (#13613810)
That was my thought too, it sounds like the tombstones were never deleted.