Remember when I mentions the "z-order" in your last question?
How this code flows ?[
^]
That's what causes it.
Because you added the label after the panels, it has a higher number in the z-order, which means it sits on top of other controls.
How to fix it? Simple: move the label so it's part of the "Most Active" panel instead of on the form directly.
Try this: in the designer, highlight the "Most active" panel, and shrink it's size vertically - the label will remain in place. This shows that it isn't part of the panel at all!
The easiest way to add it to the panel is to delete it.
Then drag a new label from the toolbox, and drag it over the "Most active" panel until it's border appears. Then drop it on the panel. Now it's a part of the panel, and won't appear "above" other panels.