THC-Hydra - one good pass = shows all valid

As in title. I'm testing my router security and I came up with problem.

hydra 192.168.0.1 http-get-form "/:un=^USER^&pw=^PASS^:User Name or Password is incorrect." -L usernames -P passwords

usernames : admin

passwords : admin, root, toor, 1234, realpassword(correct one)

I get: 1 of 1 target successfully completed, 5 valid passwords found

Only realpassword is the correct one but Hydra says all of them are good.

When I go to 192.168.0.1, which is router page, cookie (I guess) from Hydra allows me to be logged in. Still, executing this command does not provide me password, only session.

Q: How can I find out what password is real?