[ewang1]

#3: I remember it being mentioned that both those planets were orbiting the black hole, Mann was probably on the opposite side of the black hole that Miller was on. Only Edmunds was further. They went to Mann via the farside to avoid the black hole (as they did with Miller), but perhaps the explosion and spin pushed it to the side of the planet that was closer to the black hole.

[SkyMarshal]

My understanding is that the water planet was closest to the black hole, as it was the only one they had to be super careful with re time dilation. Eg, every hour on the planet is 7 years on Earth, and some amount longer even just back on the orbiting mothership - Romily aged 23 yrs while he waited up there. That wasn't a problem with Mann's planet, further away from the black hole.