So, when a time machine sends you back in time you end up in the same physical location that you were in when you started.
The problem I see with this is that the galaxy is moving as our solar system rotates around the galaxy etc. down to the rotation of the Earth and the shifting of land. Your house is millions of miles away from where it was a few seconds ago, right? So wouldn't a time machine dump you into the middle of nowhere if it's aiming at the exact same point in physical space? I don't see how it could account for all the movement an shit.