My tweets are invisible


To understand my problem I tell you the story from the beginning.
I created a twitter account to follow a star. So I have a single subscription (the star in question) and all my tweet are only responses to this star that I follow.
The weird is that initially my tweet appeared in over the answers on behalf of the star with the other answers. But for some time my tweet are visible on my account and not on account of the star. While the responses of other subscribers appear, mine is invisible and even the old tweet that appeared before.
NB: I have a single subscription and only 29 tweet to date. Maybe I should follow more people?
Thank you for your help