Hi TR,
Welcome to this Microsoft Project newsgroup
I'm not sure how you are "moving durations". Are you clicking and tragging
bars on the Gantt Chart? Not a good practice as if you do as this will
create constraints that will reduce the flexibility of your project. Start
date should be defined by the logical link from its predecessor, and finish
is calculated by Project from the Duration you type in.
FAQs, companion products and other useful Project information can be seen at
this web address: <
http://www.mvps.org/project/>
Hope this helps - please let us know how you get on

)
Mike Glen
MS Project MVP