"Ghost" Notebook items

I have a remote user who swears she has deleted all entries in notebook topics, but some are still printing next to the bars.  She sent me a screen print of a task with no notebook items, but I can still see it next to the early bar. In fact, it's overlaying other data she is trying to display next to the bar.  She still sees them, even though it has been several days, and many reboots.  Has anyone seen anything like this?