There's something wrong with whatever you're using or however you're accessing the Forum. It displays fine for me on my Windows 10 Desktop PC (Edge, Chrome, IE and also Firefox), my iPad and my Droid Turbo 2 phone, both using a Chrome browser.
Just with what and how are you accessing the Forum? It doesn't look like you're using the Xfinity My Account app because the 'Contact Us' options only gives 'Talk to an agent', 'Connect with us on Messenger', 'Tweet @ComcastCares' or 'Feel free to stop by your COMCAST SERVICE CENTER'....go figure.....
We are happy to investigate this further for you if you would like to share your device (include model number), browser (include version info).
Learn more about Java updates here: https://www.java.com/en/download/help/update_runtime_settings.xml
We apologize again and look forward to hearing back from you.