This problem gets worse over time!
I bought my device in early November. In the beginning, it only occasionally happened that the T1 made 2 clicks out of one. But now, more than 50% of all left clicks and about 20% of right and back clicks are recognized as double clicks. This makes the buttons almost totally useless. It is clearly a hardware fault. If you rooted your device and use Cool Reader, you can go to options menu and tel the software to advance 1 page on double clicks. This will work around the broken hardware keys at the cost of larger page turn delay.