right.
I don't have the Route builders guide (never been much good at reading instructions).
Firstly a few keys to aid in your Route Building.
W - Toggle Wireframe mode for Terrain.
N - Level any object in the Route Editor While Selected.
J - Refresh terrain.
T - Rotate Track Section or Road Section.
Y - Bring terrain to bottom of Track Piece.
F2 - Toggle Select Mode For Objects. (NOTE toggle mode on and OFF).
F3 - Move Object mode.
F4 - Rotate Mode.
F5 - Placement mode.
F9 - terrain edit mode
Now, On with your Problem.
It looks like you have got wrong selection.
Also I found a few Of UKFS tracks difficult to select at times.
For Learning the Route Editor Use only the Default track. It's best to learn how to walk before you try to run.
Right. get selection mode toggled to ON.
eg hovering over a track piece will turn it red. (CLick with left mouse Button).
Now that track section should go almost see through with the Wire frame bits.

(we are not going to even mention terrain here).
Now you have your Track section looking like a frame of that track section. Use F3 and toggle Move mode ON.
Move the tracksection somewhere. anywhere. (USE "CTRL" key {held down} to Keep it at the same height while moving track section)
now change to placement mode. (F5)
place a new track section joined to the current one.
Don't de-select the new track section or if you do re-select it with the selection mode (F2).
With the Track Section selected it will let you goto Rotation Mode (F4), goto Rotation mode now.
Use the mouse (left button and hold) to rotate the track up and down.
you should now be abled to Place select move and rotate track sections.
Hopefully this will Allow you to do just about most of the route building stuff

(the guide may help with other requied bits but as I said I don't have it)
Regards
Alan