When I edit a path in Inkscape, sometimes it selects an additional to the one that I've clicked.
This will cause me to move two vertices, then I realize that so I have to do undo, click the one vertex I want to edit again to really only select that one and then move it again.
What causes this? How do I prevent this? This is really annoying.
Although I cannot be sure from just the description, I would suspect you are misclicking, selecting the path segment insted of just the vertex/node. Selecting the path segment basically selects the two neighbouring nodes so they move together.
Another possibility is that you inadvertently scroll your mousewheel while/after clicking on the node, which expands the selection to neighbouring nodes as well (in this case, it selects both neigbours of the selected vertex if I recall correctly)
