if you write to somebody with his name and “@” he even do not see it, because reads many tweets. he does not scroll his feed till place where he read last time.
you cannot see retweets of your tweet, can you?
you cannot see replies to a tweet except tweet of yourself, if author of that tweet do not reply to that reply.
(“tweet” is twitter post).
2010-10-07: all these are in new version of twitter.