Indeed, RadListBox has such glitches and that is why its visual states will be revised.
Basically, we have two kinds of appearance for ItemsControls in Expresison Dark theme and this results in the discepancy you noticed. Some of the ItemsControls, such as RadMenu or RadComboBox use the same mouse over and selected states as in RadListBox. RadGridView and RadTreeListView, on the other hand, display slightly different states due to the different nature and purpose of the controls.
Update of the RadListBox Expression Dark theme will be available in the nearest LIB.
I hope this information will be helpful.
the Telerik team
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