Multiple "Modify Component" Edits - ABD 593

Shouldn't I be allowed edit multiple similar elements at the same time?  For example, I have a bunch of motorized dampers and I want to change the Air Flow from Supply to Fresh.  I thought I was able to do this in the past but now I can't.  No matter how I try to do it, either by manually selecting all of them or by right clicking and selecting Edit on the group in the DataGroup explorer, it will not accept the change.  What I am I missing as it seems that this should be a very basic requirement?  I've checked the catalogs and these are editable fields.

John K.