I hope dreams are not necessarily God trying to tell us something. Last night I dreamt that I was fighting robots who were shooting lasers, managed to defeat them, but then they walled me into my bathroom very "Cask of Amontillado" style.
Don't ask me where it came from because I don't have a clue. I am a nonviolent, nonconfrontational GIRL for crying out loud who doesn't have much interest in lacer shooting robots. I have a recurring dream about either my grandmother who passed away or my childhood dog. I typically find them in the same place, but like you said, never in the same dream. I never really analyzed them, though.
Maybe you haven't let go of them and still think about them in their final state? My sister once did a dream study for a science project and proved that if you talk about your dreams you are not only more likely to remember them when you wake, but are more likely to dream the same dream again. Maybe this is partially what's happening?
If you think God is trying to send you a message, open up your heart and mind and ask him what the message is. If you listen, he will most likely reveal it to you.
I hope this helps (or at least amuses you somewhat!)