Klamper Audio

I'm not sure I understand the need for a LOW PASS filter with a default frequency of 20 Hz and a HIGH PASS filter with a default frequency of 20 kHz in multiple Klamper Audio plugins.

Enabling both would create a band-stop filter from 20 Hz to 20 kHz, effectively filtering out the entire range of human hearing.

Or maybe—just maybe—in this "clean and professional" interface, the filter labels are swapped? Of course, that seems highly unlikely, because if that were the case, it would seriously make me question the developer's professionalism and avoid these plugins entirely.