I remember blender being pretty easy to use. For some reason I keep running into problems. For example:
Create a circle mesh with no faces.
Cut off half the vertices and connect the two ends to make a half circle.
Scale it up and apply the scaling. (Don't know if it matters, but I'm using imperial units.) The faces appear odd, which turns out to be because the faces have been doubled. I fix this by removing doubles and recalculating normals.
Extend the edges down and fill in the top, ending up with a semi-circle platform looking thing.
Do a loop select on the side faces and deselect the rear diameter face. One of the adjacent faces is also deselected. I decided to try deleting the seemingly connected face and recreate it. However, when I try to select ONLY the lower two vertices, all four vertices are selected like so: