picture #1: sometimes this losing texture problem is detected because of your PC (laptop) performance (like CPU, RAM, ...), or even texture for building is incorrect or missing. also have you turn on "High Polly Model" in the graphic option?
picture #2: if you choose lactism religion in this monument, god power doesn't include in this religion. you have to choose Calvinism or Shamanism religion to gain god powers. For your problem, you have done half to complete. after choosing 1 or these 2 here, research tech "Divine Intervention", which is in TC, this tech cost 250 fame to do so. and you have the god power. the god power is in Monument. remember, you only gain 1 power per age level (not count or Battle Drum power as this power is SAN enlightenment age power start)