I don't understand why will only the 12 ohms lamps turn on when the switch is in position 2. shouldn't the current flow like this (like I highlighted in the picture)?

Current only flows from a higher voltage to a lower voltage. What you highlighted cannot happen because current cannot flow towards a lamp unless there is a lower voltage on the other side of it. The current will continue to the lower voltage of the battery instead.

If football was tossed in air without gravity or friction the ball would go into space