The Guide give instructions for many options. It seems you have configured it with wrong options.
You are using apt-get remove command which does not remove config file "/etc/rbfeeder.ini" and mlat-client. You have to remove these as well before you reinstall rbfeeder.
Dont look to Guide, simply follow steps below:
(1) Delete rbfeeder's configuration file, and remove existing rbfeeder and mlat-client
sudo rm /etc/rbfeeder.ini
sudo apt-get purge mlat-client
sudo apt-get purge rbfeeder
sudo reboot
(2) Install rbfeeder again
sudo bash -c "$(wget -O - http://apt.rb24.com/inst_rbfeeder.sh)"
During installation it will ask to install dump978-rb. Say No to it.
(3) After rbfeeder installation is completed, restart it
sudo systemctl restart rbfeeder
(4) Go to the "Claim" page (link given below), login to your RB24 account, and follow instructions to claim your station by linking it to your RB24 account
https://www.radarbox.com/raspberry-pi/claim (5)
OPTIONAL: If you want to participate in MLAT, you have to:
(a) Install mlat-client
sudo apt-get install mlat-client
sudo systemctl restart rbfeeder
(b) Set your Location on RB24 map if not done during "Claim Your Station". See attached screenshot below (click on image to see full size). Click "Edit" to open location setting dialogue (on screenshot, the red arrow points to "Edit")