Cichlid acting weird?

In my cichlid tank we have a large castle for them to hide in and such. The cichlid that has pretty much taken residence in the castle since day 1 seems to have been ousted by the male of one of our male/female pairs. Fish #2 is, in fact, pretty much keeping EVERYONE outside the castle. (The female of that pair is hanging out underneath where the filter flows into the tank, as she always does, acting like it's her own personal jacuzzi.) My husband got too close to the tank, and it copped attitude with HIM. Should we be expecting the pitter patter of little fins sometime soon, or what? This is our first cichlid tank, and we've only had it since summer, so we don't know exactly how cichlids are supposed to behave.