Some public wall posts missing in facebook api response -

i use facebook api crawl post 1 page wall. post published random facebook users. posts shown on landingpage.

that work's fine first dev tests. since have switch live version (now random user write posts) posts not in facebook api's response.

my first thought privacy setting of post not public. shouldn't see when logout.

why didn't see few posts? have tip?

$url =  '/' . $pageid . '/feed?fields=from, message, id, link, type, created_time, updated_time, shares, object_id,comments.limit(1).summary(true),likes.limit(1).summary(true)&since=' . $since; 

try adding &filter=stream call.

facebook defaults "top story" feed can hide objects due low "score". force return in "most recent" style feed objects shown , in chronological order.