Hey,
The Boolean Cutter objects should be hidden in the viewport, I can see in the outliner the objects named Bool1 and Bool2 are hidden in image 1, 3 and 4, but in image 2 they are not. You’ll want to disable them in the viewport (eye) and render (camera).
Also I would suggest renaming objects as soon as you add them, you seem to have quite a few objects named cube and cylinder, anyone of these could be a duplicate Boolean cutter added in error.
