macbook 12-inch jumping cursor

I would like know if anyone is having issues with cursor jumping (to where mouse pointer is). it is as if the palm of my hand is hitting the trackpad.

I have tried the following settings, but does not seem to have any effect.

1. I set click to Firm

2. Disabled "force click and haptic feedback"

"tap to click" is enabled, but i actually like to use this. I will try this, but it is already set to firm..

my other macbooks do not have this problem and i have just about the same software installed across all of them.

I am using new Macbook 12-inch (Retina, Early 2015) Yosemite 10.10.4