Thank you for sharing this observation and for your concern with RadControls.
This behavior came as an issue we missed while migrating of the demo section. It can easily be fixed by removing following line from the code because the skins are preset globally in the new version of the site:
sender, EventArgs e)
// RadScheduler1.Skin = RadSkinManager.GetCurrent(this.Page).Skin;
the Telerik team
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