Business Service Manager 4.7
There are two ways to control visibility of element-bound items in the Layout View.
1) Use the global condition filter
2) Use the drawing-level element-specific visibility UI in the Layout View palette to control visibility for an element in the current drawing.
Both of these methods end up controlling the same SVG-level attribute of "display" in the drawing. When conflict, the drawing-level visibility filter will override the global condition filter.
If a user hit a case where he turns off a global filter condition, but the drawing still shows a shape or element in the drawing of that globally-filtered condition, the case here would be that there may be a drawing-level visibility filter which is overriding the global condition filter which keeps the element visible in the drawing.