To reproduce:

Add a RadListView with some items. Set the theme to Office2013Dark/Light, select one item, hold shift and select another item. You will notice that only the current item appears selected.

Workaround:

Use the attached theme files. Load them as follows:

ThemeResolutionService.LoadPackageFile(@"PathToTheme");
ThemeResolutionService.ApplicationThemeName = "Office2013Light";