We also put in only 7 frames when we took a wild hive one time. Come requeening time, I've never had so much absence of fun. We were out bush helping the mates requeen, and took home a spare queen. It was already mid afternoon. Lo and behold, the darlings had built tunnels, moats, passageways, rooms with chandeliers, curtains, big palaces with ballrooms, in short, so many places to hide the Royal Highness, that in desperation I ran into town with the largest worker I could find. The mates identified her as such, and I had to split the hive with one queen in each super separated by newspaper. Unfortunately, neither hive took, but that is another story. Now I make sure there are no fewer than 10 neat and tidy frames (and order queens with spots on them).
I hope you have as much enjoyment from them as I do ;)