I have this problem, too. I bought a 12" 2015 Macbook on New Year's Day and loved everything about it except the randomly skipping cursor, which sometimes even skipped right out of the app I was working in! Brought it to the Apple Store January 20 when I couldn't find a way to control the problem, and they replaced it with a new one immediately. New one is great - but the cursor still skips. I am not in the mood for returning and setting up a third one, when this seems to be a more prevalent problem than I expected. I tried typing with my hands held in the air like the old typing teachers used to try to get us to do, but the skipping persisted.
A few minutes ago, I turned off 'tap to click' and since then the cursor hasn't skipped. I don't mind clicking instead of tapping if that stops this foolishness. I'm a little ADD to begin with, and the skipping cursor just crashes and burns my productivity!
I wonder why the force touch trackpad has to be so wide! And if it does, why it can't manage to just ignore input while I'm actively typing! In every other way, I absolutely love this computer, which is a replacement for a 2011 11" Air with a full drive, worn keys, no retina screen -- and no skipping cursor!