Not exactly surewhat is happening but you need to look at the touchpad utility which would be preloaded onto the system. With this you alter the behaviour of the touchpad e.g. speed of scrolling, double click speed etc. It`ll be in the start>programs list perhaps called "synaptics". Usually the right hand side of the touchpad area can be used to scroll up and down and the bottom left and right. If it`s a small pad this can be irritating.Similarly the touchpad may "lock" the scoll feature when you click the left button which is useful if you hae a long document but again irritating if you don`t!
Havea readon thehelp file associated with your device. I`msure you can disable some of these features.