Hi Meg! I tried and I saw the same issue that you had - so I checked around and I think that I just wasn’t hitting the edit button aggressively and exactly enough. If you make sure you are exactly in the middle of the edit button you should get the edit page (I added screenshots above).

I find that it is impossible to click on the little pencil symbol. Clicking on the Filter icon brings me to the edit page, showing me what is being filtered and allowing me to change the filter. But I cannot see any way to delete a filter. I don’t see a trash can on the screen. If I’m just missing something, please tell me where to look. Thank you.