Add Vertex tool is latching to end vertex from ~100m away
I have recently started playing NoLimits2 and am currently trialing it on the demo version. I am trying to finish a coaster but I am having trouble building the track because my 'Add Vertex' tool keeps snapping / latching to the end vertex, as shown in this image...

As you can see, the white line is extending ~100m from where the end vertex is. Is there any way I can disable this so it only snaps to the start vertex (the triangle one), and not the end one (the rectangle one)?
Sorry if I sound like a noob, but I can't think of any other way to describe this, and I can't find any results on the internet because I don't know what to search for...
Thanks in advance for any help, it will be greatly appreciated :D
PS: I am running this on a Windows 10 PC.
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Checking Out Vertex Tools - VERSION 2! What's New?
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Karolina Grabowska, Klaus Nielsen, Katerina Holmes, Anna Shvets
