Started weighing my flour about two years ago after pretty much the same thing happened to me. My scoop was way heavy too and it made everything dense. What got me though was when I finally weighed the rest of my stuff, my brown sugar was packed in so tight that a cup weighed almost double what it should. Same deal with oats and even cocoa powder. So yeah, it is not just flour. Once you start weighing, you find out half your pantry was messing with your recipes.

Ha! Sounds like digital hoarding with extra steps, but hey, whatever works to fool your brain.

Gaffer tape. That's it. Done deal.