He is as always full of sh!t.
He is trying to bookmark a post from a site that he has already done one from.
Sometimes this works and sometimes it bookmarks the site not the post so if it is that you get the conflict.
A computer person can explain why or how to make it not happen,I can`t.
He is either looking for a long "Don`t go Tom" thread or has finally realized that his little stupid charade has been found out by too many.
Either way...may he find the Lord somehow or let his worthless soul as it exists now rot in hell for eternity.