GridControl - Tagging/Checkedit in Grid

Hi there,

Excuse me as this seems like it's been asked before but I can't seem to get it to work.

Essentially, I have a Grid that has a "Tag" column (a bool checkbox).
This could be pre-tagged from the database.

When a user tags a row, I want to ask the user a question "Are you sure?"
- If yes, I want to tag it and do something.
- If no, I want to cancel the whole thing - as if he did nothing.

My questions is/are:
When do you show the checkbox to cancel the editing if he says no? From other issues I've found, I'm to place it inside ShowingEditor - which does actually work, but if user chooses "Yes", I need the row to be tagged and commit the row - I don't want to stay in editing. How can I do this?
Reason for this, as if its in edit mode, the user can tag and untag it as much as he wants without ShowingEditor firing. I want it to fire every single time.

User flow:
Grid with taggable row : http://i.imgur.com/q453enz.png
User clicks the checkbox: http://i.imgur.com/AMgI49C.png
Presses Yes => Tag row and commit editing, but it says in edit form: http://i.imgur.com/IJbPE3E.png

My ShowingEditor method:

C#
private void gcLines_OnShowingEditor(object sender,  
          ShowingEditorEventArgs e)  
      {  
          if (e.RowHandle != GridControl.AutoFilterRowHandle)  
          {  
              var viewModel = (LoadTrucksViewModel)this.DataContext;  

              if ((bool)e.Value)  
              {  
                  e.Cancel = !viewModel.AskToConfirmUnloadSelectedRoute();  

                  if (!e.Cancel)  
                  {  
                      viewModel.LoadSelectedRoute();  
                  }  
              }  
              else  
              {  
                  e.Cancel = !viewModel.AskToConfirmLoadSelectedRoute();  

                  if (!e.Cancel)  
                  {  
                      viewModel.LoadSelectedRoute();  
                  }  
              }  
          }  
          gcLines.View.PostEditor();  
          gcLines.View.CommitEditing();  
          e.Handled = true;  
      }  

I've tried adding those last 3 lines to no effect.