I'm a little unsure if I should be worried or if maybe I just need to add more rock to my tank to allow them each their own space.

I brought home a yellow watchman goby and a fire fish last Friday and after acclimating both to my tank they were turned loose.

I didn't see either of them on Saturday and then occasionally I'd see the fire fish. I was looking last night (tuesday) and noticed that both the Goby and the fire fish are sharing the same hole. Is this something to be concerned about?? Also I have another Watchman Goby/Pistol shrimp pair in my pico tank which G'm going to tear down next week to prepare for our move are they going to do okay with the other watchman in the tank?? Or would I be better off rehoming one Goby?