Man you know, it's all about configuring right values for parameters.
I had a similar issue with my touchpad, pointer moved sometimes and very often it simulated a right click with a consecutive left click, even with light vibrations near the touchpad, causing the creation of new folders and files all around

I solved taking note of the values of
synclient from another distro working fine, and then created a xorg configuration file with that values because they were resetted back by default. What i can suggest is to check values regarding finger pressure (for me that was the problem, but there were also some problems with mapping taps to buttons, solved with appropiate options) but i repeat, in the
synaptics man page you can find the meaning of each parameter... Try tweaking them with
synclient 
Enjoy!