.NET 3.5 WinForms: Changing the value in DataGridViewComboxBoxCell modifies other ComboBox controls on the form

Question

I have a DataGridViewComboBoxColumn being programatically databound to a generic list. I also have another combo box on the form. Whenever I change the value of any of the ComboBoxes in the datagridview, the ComboBox on the form also changes its selected value.

I didn't intentionally write any and don't see any code that would even relate the two controls on the form in way or shape. The only thing they seem to have in common is a shared datasource.

Answer 1

http://stackoverflow.com/questions/1729873/how-to-separate-the-selected-item-of-two-combobox-with-a-single-datasource

Duplicate question. Still, this seems ridiculously stupid - we have to clone datasources for WinForms?