I am trying to link two rails separated by 1 space without making all kinds of crazy detours and loops and it just wont work. Whenever I have rails separated by 1 space in the middle, they won't link, as shown in the picture. If there is 2 or more spaces in the middle, it works fine.

The only thing that works is spreading the line so it is 3 wide then joining, or doing a complete loop ... neither of these options are great as it is really ugly and takes a ton of space.
Am I doing something wrong or is it just messed up?