Few insights into the problem.
(1) DSP based mouse use chip to control freeze delay between individual click, if mouse is new this could be a manufacturing defect.
(2) As mouse ages, return spring of click button loses stiffness and bounces under clicks and thus produces several clicks for one.
Tough Fix:
Open mouse replace click sensors on PCB by desoldering, switching places of sensors and resoldering.
*****Easy Fix*****
(1) Go to control Panel> Mouse >Double Click Speed and drag the slider to the middle between Slow and Fast.
(2) Download Utility MouseFix version 1.0
http://www.mediafire.com/?2cr4157s0rtnm44
(3) If rebinds keys and fixes double clicking, you can also use Left Shift as mouse click using this utility, Right Shift remains the same.