solar penguin wrote:
Thanks. So since the SPILL platforms are west of 1-4 they should
logically be -1 and 0. I can see why the planners preferred A and B
instead...

The SPILL platforms are (obviously) on a different level to all the
other StP platforms and they are actually located under the MML
platforms along their northernmost half, so A & B are good characters
for the SPILL platforms.