SelectionChanged Firing Erroneously

[SezMe]

I have an event handler for the SelectionChanged event of my Tab control. On one of the tabs, there are several ComboBoxes. Every time a user makes a selection in any one of the ComboBoxes, the tab's SelectionChanged event is fired. That's just not right and needs to be fixed.

Also, if the user moves the focus out of the tab control and then back to the previously selected tab, the SelectionChanged event is fired even though the selected tab has not changed. That also needs to be fixed.