Multiple-pattern journey segments are shown with same geometry when snapped to streets

[mattwigway]

It is now possible to have a journey that has multiple patterns, like so by specifying a patterns array in journey segments, like so:

patterns: [
  {
    from_stop_index: 10,
    to_stop_index: 23,
    pattern_id: 'red'
  },
  {
    from_stop_index: 14,
    to_stop_index: 28,
    pattern_id: 'green'
  }
]

However, when you zoom in far enough that the patterns snap to streets, transitive is simply choosing a street to snap to, for example here: http://www.carfreeatoz.com/planner?from=Fort%20Totten%2C%20Washington%2C%20DC&to=Gallery%20Place%20-%20Chinatown%2C%20Washington%2C%20DC&modes=BICYCLE%2CTRAINISH%2CWALK&start_time=8&end_time=9&days=M%E2%80%94F

Or, in indianapolis (the red line should be on Shelby Street, this is following the geometry of the 31):

We can improve this by making the bundling in browsochrones less aggressive.