Yes, I’m also confused.
My roller shutter engine has two factory screws to set the limits. They are set by installator when the shutter was installed on first time. This is the “hardware calibration”. You can modify theese limits, but you have to disassemble the cover to access engine.
Then, when you calibrate the Fibaro module, it learns its hardware limits to allow software to know the level and other device parameters. This is the “software calibration”.
Putting a wooden chair is a good idea, but I think there are more elegant solutions. You can talk with your cat about that. 🙂