Normally you only get an expresso if you only press once and keep pressing forwards.
Unless you want a very strong coffee, in which case the machine grinds twice

With the arrow to the left before you press the start button, you can select the quantity, one or two cups.

Yes, the espresso runs out of both holes.

Hello, on the drawing of the number of cups, does it say x1 or x2? If it's on x2, it's normal for you to have 2. Best regards