To reproduce:

Create a RadPageView and add these items:

RadPageView pageView = new RadPageView
{
    Parent = this,
    Dock = DockStyle.Fill,
    ViewMode = PageViewMode.Outlook
};

pageView.Pages.Add(new RadPageViewPage("Machines"));
pageView.Pages.Add(new RadPageViewPage("Users"));
pageView.Pages.Add(new RadPageViewPage("Software"));
pageView.Pages.Add(new RadPageViewPage("Queries"));
pageView.Pages.Add(new RadPageViewPage("Reports"));
pageView.Pages.Add(new RadPageViewPage("License Manager Servers"));

You will see that the Users and Reports items will be auto ellipsed.

Workaround:

Change the font of the item. Changing the style should be enough:

foreach (RadPageViewItem item in (pageView.ViewElement as RadPageViewOutlookElement).Items)
{
    item.AutoEllipsis = false;
}