why facebook delete my post/link so fast

hi i face something so strange in these few days..
i post link on page then share it to my own groups, but my link soon deleted in group. but it keep remain in page..

anyone have same problem?
what cause it?

i have try to cloack it with this way hhttp://www.blackhatworld.com/seo/method-how-to-post-blocked-links-facebook-twitter-instagram-more.802331/

but still have no clue what happen..

FB will see your links although you cloak them. Maybe your links are listed as spam. Try to remove them by first and post again.