Not all of these are correct. For instance, the one for Fulton St Station shows the two J/Z platforms as being on the same level, when in fact they're on two different levels.
This is the closest possible approximation of the Fulton St Station hypercube understandable by humans. Some compromises have to be made to represent non-Euclidean spaces in ways that residents of lower dimensions can understand.
Look at this guy! He can't even moonwalk on the J axis
Hi I'm the creator. Thanks for the note - you are not the first one to point that out and it's been sitting on my "to fix" list for years... One day I will get to it!