Join unsorted tracks

[Manut]

Hi!

I am planning a bike touring trip across Europe and I found a web where I can download gpx files for long routes. When I open the file in my BaseCamp the file has many tracks. They are not ordered (Track one is not at the beginning), they dont follow the same direction, and they make complete circles around roundabouts. Therefore, trying to join them as a single track results in a very chaotic track. 

Am I missing something?. I know that BaseCamp gives me the option to put the tracks in order and reverse them before joining, but they are so many that this would take forever. Might it be an option to create a track just following the points of the individual tracks?

I leave here a simple example.

Cheers!