Ordering correct films for Passenger lists

I have ordered 2 films form the LDS for Passenger Lists from England to Boston for May and June,1907. I have looked at the film for May today and it has mainly April on it although it is clearly marked on the film May. What I would like to know is, will the film for June be mainly May and should I have ordered the July film as well? It is a shame that the only information that is on this film is a name and maybe an age of the person travelling, you would really need to know who and when you are looking for to be of any help.[V] Regards Kerrie in Sydney Australia