I've had problems but it's not the software, it's the human. The trick is you can't just hover over what you perceive to be the notch filter, you must have the icon change to the N-E-S-W black arrows. That is the indication the filter context menu (showing delete) will be active on a right click (or left if you have the mouse set other-handed. Very early on I didn't realize that was the icon indication you needed to enable the tnf context menu. That said, the narrower the menu the harder it is to position the mouse to activate the context menu. If you hover over the filter left button down and slide the mouse up (wider) or down (narrower) you can notch out only that signal necessary.