Output cannot be placed in a file

[ImGyba]

I want to run waybackurls for a list of domains and I need the output placed in a text file. I tried using these commands:
cat list.txt | wayback >> results.txt
cat list.txt | wayback > results.txt
Unfortunately, it doesn't work and the help of the wayback command is written in the results.txt file instead of the expected output. It works ok if I run just:
cat list.txt | wayback
Once I try to push the output in a file it's not working anymore. Any idea on how to fix this?
Thank you.