[sdiy] faulty switch causing bounce?

[mark verbos]

Is it possible for a bad switch to cause bounce? I have a C&K 7105 (on) off (on)  set up as an advance switch on a sequencer. If I push it one was it works fine, but the other way makes the sequencer count 2 steps. I have a 2.2M resistor to ground and a .05 uF cap to the positive rail. This setup has worked fine for me many times before. I'm confused, how can it be only when the switch goes one way?

Mark