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First of all, I would recommend that you deselect the "Load Summary Resource
Assignments" option before you attempt to level overallocated resources.
Doing so will allow you to focus your leveling process on only the projects
you open. If you have a resource that is overallocated across multiple
projects, you will need to open each of those projects. Also, open the
project in which you leveled the resource overallocation and clear the
leveling using Tools - Level Resources - Clear Leveling. You need to remove
the leveling before you go any further.
The behavior you describe can happen if you attempt to level resource
overallocations in the Gantt Chart view, because you lose control of the
leveling process. My company recommends that you level in the Resource
Usage view, one resource at a time, beginning with your key or most critical
resource. In the Resource Usage view, select the resource in question and
click Tools - Level Resources. In the Resource Leveling dialog, deselect
the "Clear leveling values before leveling" option, as this will allow you
to level one resource at a time. Click the Level Now button, choose the
"Selected resources" option in the Level Now dialog, and then click OK. The
system will attempt to resolve your resource overallocation by either
delaying one or more tasks to which the resource is assigned, or by
splitting one or more tasks to which the resource is assigned.
There's no guarantee that the system can ever level your resource
overallocations the way that you wish, and there are some overallocations
that the system cannot even touch. For example, a resource's Max Units
value is set at 50% in the Enterprise Resource Pool, and you accidentally
assign the resource at 100% Units on the task. Because the leveling tool
does not touch the Units field ever, it cannot resolve this overallocation.
To see the results of leveling, click Window - New Window. In the New
Window dialog, select the Leveling Gantt view and then click OK. In the
Leveling Gantt view, green bars represent the pre-leveling schedule of tasks
to which the overallocated resource is assigned, and blue bars represent the
post-leveling schedule. If you see a brown underscore in front of a blue
Gantt bar, that is the Leveling Delay the tool applied to the task to
resolve the overallocation. You should see the amount of the Leveling Delay
in the Leveling Delay column.
Why don't you try leveling using this methodology and let us know the
results. Hope this helps.
