Thanks.  I will go look sometime as i am in Stow, post storm issues, so please don't innconvenience yourself.  sometimes changes are from paid armchair mappers and I am much more deferential in editing to other locals.  What didn't make sense was that the shelter building was not obviously reachable from the platform.  The ones on the platform seem totally right.  Its the big one ese of the South Acton label.