Can't find facebook wallposts on my activity log?

[Lavender7890]

I managed to delete all the wallposts i posted on a particular friend's wall that i could possibly find on my activity log by going on "activity log" and filtering it to "your posts" for particular years. However when i checked "see friendship" i found that there were still some wall posts there that i couldn't see on my activity log. Strange how i could only find some and not others. Is there any way of deleting such old wall posts? why can't i find them on my own facebook page? for all the months under 2008 for e.g my activity log is clear, i kept on checking to see if i was missing something. I also checked if i had "hidden" them by mistake but that wasn't it.
Is there a way of keeping certain mutual friends from viewing "see friendship"?

[David]

Facebook gives me a headache. i use yotive.com