How to cite the same source multiple times in a row IEEE
According to this guidance document (See page 7) on the IEEE website it appears that you do should the following when citing the same source multiple times in a row.


  References Within a Reference:
  
  Check the reference list for ibid. or op. cit.
  These refer to a previous reference and should be eliminated from the reference section. In text, repeat the earlier reference number and renumber the  reference section accordingly. If the ibid. gives a new page number, or other information, use the following forms:
  
  [3, Th. 1]; [3, Lemma 2]; [3, pp. 5-10]; [3, eq. (2)]; [3, Fig. 1]; [3, Appendix I]; [3, Sec. 4.5]; [3, Ch. 2, pp. 5-10]; [3, Algorithm 5].
  
  NOTE: Editing of references may entail careful renumbering of references, as well as the citations in text.


On the same page (7) of the document in the section referring to references it states that;


  ... they appear on the line, in square brackets inside the punctuation


It would appear from this guidance note that the example that gave is correct unless you are referring to different pages of the same document then you need to reference as per form above. 

Also the IEEE document says that you may refer to The Chicago Manual of Style, published by the University of Chicago Press, for anything not covered in their own guide.