We were using the TargetingRange droplet to display a number of slides, starting with the 2nd slide. We would never show more than 9 slides so we set howMany to 9.
What we found was that the TargetingRange droplet was always returning all the slides, including the first slide, no matter what we set for start.
Fortunately ATG support identified this problem as Bug #84551. If the howMany param > number of targets returned then it ignores the start position parameter.
The work around is to make sure to set the howMany parameter to the number of items you expect.