According to this post: http://forums.obsidian.net/topic/89617-not-receiving-full-reward-from-store-purchase/?p=1850017 the buried bundle only appears if you haven't bought anything in the last 10 days.
Hope this clears things up.
According to this post: http://forums.obsidian.net/topic/89617-not-receiving-full-reward-from-store-purchase/?p=1850017 the buried bundle only appears if you haven't bought anything in 10 days.
Hope this clears things up.