Modules & VBA :: Event Calls Seemingly Unrelated Procedure

I have two forms:

frmOpeartions
frmManagers

frmOperations allows the user to assign a manager to an operation by selecting the manager record from a combobox. Occasionally the user may need to setup a new Manager record if one hasn't been setup already. In this case there is a "New" "button" (it's actually a label with an on click event) that the user can click to open frmManagers and add the new manager record.

The code to open frmManagers is:

Private Sub lblNewManager_Click()
DoCmd.OpenForm "frmManagers", acNormal, , , acFormAdd, acDialog
Forms!frmManagers!cboMoveTo.Visible = False
Forms!frmManagers!lblManagers.Visible = True
End Sub

Once frmManagers is open the user creates the new Manager record and then closes the form using a similar label with an on click event:

Code:
Private Sub lblClose_Click()
DoCmd.Close acForm, "frmManagers", acSaveNo
End Sub

frmMangers also has an OnClose event that will refresh any comboboxes on other forms that refer to tblManagers to make sure that new Manager records will be available immediately for the user to choose from:

Code:
Private Sub Form_Close()
If CurrentProject.AllForms("frmPlants").IsLoaded Then
Forms!frmPlants!cboPlantManager.Requery
Forms!frmPlants!cboQCManager.Requery

[Code] .....

So the problem comes when the user clicks the Close label (acting like a button) on the frmManagers. The code successfully closes the form and the on close event successfully refreshes any comboboxes on forms that may be open, but then for some reason it attempts to run again or perhaps continue running the onClick event that opens frmManagers. Since the form is already closed it gets hung up on trying to change the visible properties of the controls and the code fails.