This morning , I have just seen that my post was... moderated because i were not in the subject... why, pls ?? Merry xmas 
By 'moderated' am guessing you mean, deleted?
If yes, then there are several resona why mods delete posts and thrash threads. It was either not relevant to the discussion, spam or incomprehensible, i.e, poor grammar.
Its also possible it was reported by other forum members.
A mod could get you a response as they have access to deleted posts.