New I-Pac 2 shift key unexpected behavior

[TheManuel]

Hello.

I just installed a new I-Pac 2 to replace my OG I-Pac from 2001. 

The issue I'm having is as follows:
- I assigned "1Coin" input to be the shift key
- I assigned "P" as its primary function
- What's working: when pressing the button wired to 1Coin, nothing happens until I let it go, and then it sends "P" as expected

What's not working:
When pressing the button wired to 1Coin and holding it, then pressing another button, the shifted function of the other button executes as expected, but when I let go of the 1Coin button P is sent also.

That is not how the old i-Pac worked, and I don't think it is intended behavior for the shift button to do its normal function when I press it just to access the shift function of another button.

Any ideas?

[TheManuel]

Turned out to be a worn out switch, although the old I-PAC seemed less sensitive to it.  Anyway, the new one works great and allowed me to get rid of my old mouse hack for the spinner and trackball.