Hie there, as long as your works are in the category 0, A or B, you can combine all your work and should get a reference letters for each according to the requirement of CIC. Hope your CRS would rise higher so that you will be invited next round, all the best to you!
May everyone here get an ITA soon and we celebrate our parties in Canada in 2018.
PS: It's my birthday today (32) but not sad, in my application I already changed the principal applicant (CRS 416)
Hope I invite you guys to my birthday next year in Canada