Hi, I recently picked up a sf 2 pinball. I like the game play , but I keep having the same issues. At the start of a game sometime I get 2 balls in the shooting lane. Other times after the ball drains, I get a few balls stuck in the drain and keeps saying "same player shoots again" I have to take my finger from under the game and slide the ball to the right to fix it. What could be the issue? The switches seem to be ok.