Not related.
The first is the witch. Make sure both switches are adjusted correctly. As Surfsled said, switch test and then thump around. It will show which one is too close. Then stick a piece of paper or something in them and thump it around again (just to prove it isn't anything else). Finally adjust the switch so it doesn't happen.
As for the launch, yes, if a ball is in the shooter lane and you activate switches, the game thinks there is something else going on and will launch it. As far as I understand it, that is expected behavior.