How to score for claiming routes in Ticket to Ride: Europe
It seems you have some misunderstandings regarding how to play Ticket To Ride: Europe. You cannot ever claim more than one route in your turn.

You can do one, and only one, of these actions in your turn From the Rulebook, page 3:


  On his turn, a player must perform one
  (and only one) of the following four actions:
  
  
  Draw Train Car Cards: The player may draw two Train cards (or just
  one, if the card he selects is a face-up Locomotive. See Locomotives
  for special rules); 
  Claim a Route: The player claims a route on the
  board by playing a set of Train cards from his hand that match the
  color and quantity of the spaces that make up the route. He places
  one of his colored trains on each space, and scores the number of
  points indicated on the Route Scoring Table for that route’s length;
  Draw Destination Tickets: The player draws three Destination Tickets
  from the top of the Tickets deck, and must keep at least one of them;
  Build a Train Station: – The player may build a Station in any city
  that does not yet have one. To build his first Train Station, the
  player plays one Train card of any color and places one of his Train
  Stations on that city. To build his second station, a player must
  play a set of two cards of the same color, and to build his third
  station a set of three cards of the same color
  


There is actually a route of 8 spaces, it's the tunnel between Stockholm and Petrograd.  

On defining a route, page 4:


  A route is a set of continuous colored spaces (in some instances, gray
  spaces) between two adjacent cities on the map. To claim a route, a player
  must play a set of Train cards whose color and quantity match the color
  and number of spaces of the chosen route. 


There are no 5 train routes in TTR: Europe, so that's why there's no scoring for that number. So both 1) and 2) on your question aren't possible.  

On scoring, page 7:


  When a player claims a route, he immediately scores the number of points indicated
  on the Route Scoring Table for the length of the route he just claimed.


You score immediately for the size of the route you claimed, and since you can only claim one route, you can score only within the table.