Have you used a different OS with your Acer before? Are you sure the touchpad behavior is not the same in compare with other distro? Is it a big issue to try Ubuntu or Mint live session just to be clear?
I had some touchpad troubles with the different kernel versions. Please type uname -r and send the outcome here to know which is yours. Maybe the good idea is searching which linux kernel is the most suitable for your piece of HW.