Try downloading DuckDuckGo browser. I could rarely get the site to load properly but it works perfectly using that one. 

Try clicking the 'eye' symbol in the last column on the threads list, this should take you to the last post on that thread.

Deleting cookies again did help but missing thread titles

Sadly I still find the site unworkable. When I post and return to the thread I can't see it and I also can't see new posts from others when I click on the thread (I know people have posted as they seem to show up when I go to 'my posts' on my profile.

Yeah the pagination seems to be messed up, I've no idea how to fix that either. Sometimes it works if you go to page 1 and then click 'next' rather than 'last' but often that also doesn't work.

After various issues my problem now is that the font for the subject and poster is white on a white background so not really visible.  

The content of the posts is fine