Hmm,
I have been using Mac's since they had the cute little handles in the top. I have no idea how many mice, track balls, pads..... I have used but it would be a large number.
If this is "simply an adjustment to the device issue", IMHO the thing is tooooo... sensitive. I have worked with mine for months and still have the same problems no matter what I do. There are times when no matter how much you call something a feature it fails to benefit the vast majority.
The other possibility is some sort of hardware/software malfunction in some of the track pads, hardware/software combinations...
There it went, for some reason, I could not type in all of pads ^ above, then it was like it was selecting some of the letters and not letting me type anything else. Tapping the track pad seemed to clear the problem. I don't think I even touched the pad before I saw the problem, I was just typing, until I saw the missing letters... It's kind of like the pad selects things for reasons only it understands...Or maybe it is a software bug, of some random nature, that got introduced with the track pad...Sometimes I just seem to be stuck, until I tap the track pad.
The fact that I am having exactly the same "other" issues the poster above mentions which I did not: added to the fact that person has apparently used multiple different Apple track pads without this problem, leads me to believe that "where there is smoke there is fire".
Maybe I will take it to the Apple Store and have it checked out.