For reference, mine is set to 100 per page.
Edit: And you’re right, some links do work. Very strange.
I was right - it wasn't holding the "max posts" setting, and screwing the URLs up. All fixed!!
Let me know if you see anything else not working on that page - like I said, there were a number of places that were absolutely broken (can't remember them off-hand at the moment), but all were corrected!!