Something isn't totally clear to me, perhaps someone can clarify. It looks as though I can take a colectivo from Tuxtla to Chiapa del Corzo, and arrive in the central plaza. However, there is no colectivo from San Cristobal de las Casas to the plaza area of Chiapa del Corzo. Instead, it drops you outside of town and you must walk, cab, or take another colectivo. Is this correct?