it is VERY common for swarms to go to the same spots not only once or twice but multiple different swarms in the same season. In fact, as many here who have seen the skep videos that are around, it was/is a common thing for beeks to do, allow their hives to swarm, and then simply go to the same spots multiple times even in the same day and shake the swarms into a basket to collect them during the swarming period. it is sort of like the best house on the block...everyone wants to live there or at least visit, for whatever their reasons are. Of course we do not do things like that usually in the states, or at least not be me anywhere that I know of...so the freequency is surely much less, but the relevance is the same surely.