Help with plotting a route?

[cloudgazer]

I plotted a route to the Tankwa Karoo.
Now according to RoadTrip my route is 270kms (via 7 way points)

But when I upload the roue to my GSP and preview it - it tells me the route is 350kms.

What gives?

 

[Panne]

 

[cloudgazer]

 

[Panne]

 

[cloudgazer]

 

[Panne]

 

[cloudgazer]

 

[Panne]

 

[cloudgazer]

 

[Panne]

 

[michnus]

 

[scrumpyjack]

 

[Gravel_Seeker]