I am trying to edit my shapefiles through QGIS 2.6.1 Brighton. I used the node tools to snap the necessary nodes to eliminate spaces between two shapefiles. However, while doing it I noticed that an extra line came out. Please see image below - the line that appeared when I'm editing is pointed out by the right and left arrows. I am also using the snapping tools while doing this.
How do I remove these two lines?