In your UIModel xml file could you check the value in the Action property (see excerpt of the relevant part of a UIModel.xml below)?
<DCControl
id="Create"
SubType="DCAction"
IterBinding="DeptView1Iterator"
Action="40"
RequiresUpdateModel="true" >
</DCControl>
Is it 40 ("CreateInsert") or 41 ("Create") in your case ?