When I update a Pad to Setup constraint, the Constraint Editor Plugin is loaded in ProjNav and the Advanced->Pad to Setup branch is selected in the tree view. There are duplicate entries for the constraints displayed here, one for a source type of NGD and another for the source type of UCF.
If the user edits a constraint with a source of NGD, the Table is updated to show that the constraint is now listed with a source of UCF. However, the UCF is not updated with the new constraint values when the user saves the change.
To work around this, manually edit the UCF.
This problem will be fixed in 10.1 SP2.