I consider this a bug but Autodesk's states this is "as designed".
GOAL: I have a drawing detailed in inches that I need to be in metric. It would be very simple to be able to fix or change a DWG by simply changing the "Standard" from Imperial > Metric. Then select all annotations and set styles to "By Standard".
SUMMARY: Changing the "Active" "Standard" style of the drawing does not update the annotations (dimensions specifically) to the new styles defined in the object defaults. Annotations seem to remember the Active "Standard" at the moment of creation. Even though the annotation is set to "By Standard", it uses the "Object Defaults" of the original "Standard".
Follow the steps inside my attached example [Inventor 2014 format] to see the issue.
QUESTION: Does anyone know how to correct this manually? So all annotations use the "Active Standard". Then I can program the manual.