I have a root entity called dataSheet that has one association entity called EEO.  I get the datasheet like this:

DEVEntities1 dbcontext = new DEVEntities1();
dataSheet ds = dbcontext.dataSheets.SingleOrDefault(d => d.UID == formID);

so now I can type ds.EEO right?
That works so I set ds.EEO.docID = 4

and then I do a updateModel(ds)

and then I do a dbcontext.savechanges()

this all works as well with one exception

not only is the EEO entity (docID property) updating in the db
the ds entity (which also has a docID property on it) is also updating.  

I want to update ds.EEO.docID

not ds.docID

How is ds.docID updating when I specifically
tell ds.EEO.docID to update?

Any help?