Problem touchscrean dell venue 7 maybe driver

good day! I bought a dell venue 7 a week ago. while using the sensor detected a significant problem. http://youtu.be/iN-F3VUI5p8 problem is that when the lists or Web pages aloud twitching and trembling as well if you reach the end of the list or continue to drag on the page visibly twitching and trembling. I went to the store and checked out the other copies all the same. in support of those that say it is not their jurisdiction and touchscreen driver error. PRS value in the engineering menu is locked at a constant value of 0.78. Please fix this problem so as to use of the tablet is not comfortable. a problem of concern to many who bought this tablet