Why is this happening? Is it a glitch? Or is it the new update?

Fizzer probably raised the ammount of threads per page because of what happened soon after the vote. With the forum purge, there was just so little ammount of threads; like the OT section had 6 or 7 non hidden threads in the first page.

No, I'm talking about having 29 posts show up on one thread page, like here: https://www.warlight.net/Forum/175976-geert-wilders-hero

Edited 9/2/2016 14:00:24

Hmm I had assumed it was because 9 posts got downvoted and hidden, but that doesn't appear to be the case. I'm not sure why that is.

I noticed that on mail threads too.
I assume the amount of posts per page has been raised from 20 to 30.

Yeah, worst part of the update imo. Not only I feel tired after reading 25 serious posts and can't keep up with the last 5, but all instances of no-last-posting have been completely ruined. Anyone in a big mailthread with me is going to look at the past and say "ha, loser". :(

We say that to you regardless.