jetpack sharing

i use jetpack sharing option, for sharing automated news items in the faceboook. i dont know if it has to do with the update in 3.8, but after the update some of the links (not ALL) that are posted in my facebbok wall they dont have the right link. i mean but when you click them are not going to my site, but for some reason i dont know, going to https://apps.facebook.com/wordpressdotcom/?fb_source=timeline_og. the problem appeared after the update, but i dont know if it has to do with that. and i am telling again that these is not happenning all the time. the sequence is 5 links with the right link and 2 with wrong and etc. what might be the problem? is it facebook issue? what?