It's pretty easy. All you need to do is finish your ride with the station a bit to the side. Once you do that, make a second station next to the other one as if in a switch station. Make another segment that has it's point the same point as the other side. Save the entire track track except for the station as an element and connect to the other station. Thats your double station. it's a little advance, but you can probably figure it out.