Microsoft Project can confuse people. What are the best practices around how long tasks should be, who should be assigned to what, and how a gantt chart should be constructed?
Now there is a new service called Ontrack, available over the web, where you can upload your MSProject file and get back expert advice on how to make your project successful.
Just upload your file (cheap but not free) and they'll get back to you in a day or so
with what you need to do to execute perfectly on your next project.
It's difficult to spot obvious errors because project schedules are complicated. And, unless you're a schedule expert, it's often challenging to discern what is the "right way" to utilize Microsoft Project. Take a look.