Because you did it in a very vague manner. If you had made a post which simply said "My program doesn't work, why doesn't it work?" you would have lost points because nobody knows what you are talking about. Sentences have a subject and a verb, your subject was "my post", how are people supposed to know what "my post" is? Are you referring to the post which contains the "where did my post go" comment? If so, it's right here. A better way to phrase it would have been "I just made a post to the Section _____ concerning _____ but it is not there, does anyone know if this is normal behavior?"