It seems your stepdad was good for you, offered protection and comfort. Great!
However, I think maybe you had some very stormy parts of those times that he helped you through. Do you think he took over where your bio father didn't keep up? I don't know that situation, so I ask.
The storms during your childhood, which is gone, put up in a fence, closed off, were weathered well, yes?
You may have just had affirmation dreams. These dreams, though not feeling it at the times in both childhood and during the dream, were you telling yourself that he was good for you. You should be thankful every day for him.