different day, different rules

Yesterday morning on La Madera, we were told by a very nice young man that it was fine to walk on the beach with our dog, as long as we had a leash and pick-up bags. Today, the same young man told us that we cannot walk on the beach with our dog. When I asked him why, he shrugged and said, "my boss." Since we were crossing the beach on our way to the sea walk, we continued walking as he walked behind us, politely but firmly telling us we had to leave the beach. We were in the process of leaving, but I guess not fast enough. I am not blaming him. Just wondering what happened. Anyone else have a recent beach experience? We have not been to La Ropa for several days and are now wondering if we will encounter the same thing there.