Disneysteve - Couldn't agree more. The total seemingly random nature of what Facebook decides you should see is very frustrating. Regularly have the scenario you describe where you and your spouse see different things even though you follow the same person. Even more annoying is they take away things after you have seen them. Example - I see a post during the day that I want to show DH, once we get home from work I try to bring it up - oh but look, it isn't in my feed anymore! If it happens to be a post from someone he also follows, he might see it sometime in the next few days ... or maybe not.
It also drives me crazy that when Facebook decides someone should see that post from days ago (or even longer) and then they comment on it, suddenly it pops up at the top of my feed again. I'm like, "haven't I already seen this" as it isn't at all clear that it is back because someone commented. The comments don't even always appear in chronological order!
Lastly, how on earth are you supposed to go back and find an older post you want to see again? I'll remember that a few months ago, someone posted something that I want to see again. Short of remembering who exactly posted it and then scrolling, scrolling, scrolling through their posts, I haven't found any way to do it. The "Search" seems to search ALL of Facebook with no obvious way to limit it to a particular group/person/just stuff I've seen/whatever.
So that is the TLDR of my hatred for Facebook. Long Live Message Boards! Chronological, Searchable, Threaded and just make sense!