My first jig saw; is this blade fitted right? Black & Decker BDEJS600C
No worries, the blade on your saw does not simply move in a vertical path. It is designed to "orbit", which means as it travels up and down it also "orbits" forward and backward. B&amp;D claims that this design has some benefits, including easier cutting of curves. On your saw the orbit action is adjustable.

Your blade and latch look different than on the box because the saw action just happens to be on the forward portion of the orbit. If you trigger it and let it stop again it will be on some other random angle, or may be vertical as shown on the box.