The style of the site is "endless scroll", which facebook pioneered. I like it and for the most part people like it especially on mobile, but without pagination it can annoy some users and I get that. There is a button to jump down to the latest post, and if you stay logged in and allow cookies it should jump to the new content.
The endless scroll can't be changed as it's the heart of the software.
Ill see if we can switch off the similar topic feature, and maybe we can try that for a while and see how folks like it.