Issues getting group listings: getting some listings, not all. URL parameters don't seem to work.

[aoiotoko]

Hi. I'm trying to fetch the latest item listings from a FB group in chronological order but for some reason I seem to get random listings. They do appear in chronological order, but they're definitely not all of them. It's like I'm getting one or two from each of the past few days, but not even the ones from the current day, it seems really random.

I've tried to fix the issue by adding ?sorting_setting=CHRONOLOGICAL_LISTINGS and ?v=timeline to the start_url inside get_posts() to no avail (those parameters seem to make no difference).

Does anyone have any suggestions?

Thanks!