I enter in the degrees, minutes, seconds, and length that I need and press Enter.
Nothing happens. I right-click a second time and repeat the process. This time a vertex is drawn where I want it. (Weird, but I go with it)
I repeat the process again for the next vertex, same thing: Nothing happens on the first try, but the second try it drops a vertex.
Only this time, this new vertex is broken off from the rest of the shape, and any prior vertices are also cut off and made independent points.