Evie, your not missing a thing, because your mental imagery is old, and it changes constantly. Simply doing the imagery with no feedback begins the process within your brain... which you have already been through. A few pieces that your brain may not have engaged are what you mention in relation to being slightly triggered, but otherwise, you have dealt with the majority of it at this stage, and this was purely informative for you to view your progression since being here really.
You answered it yourself above, relating to believing how much progress you have made, that was the idea of what little I have put here for you. I think your doing just fine at the moment, and your already on the right path to heal yourself and learn how to manage PTSD.... your not in denial anymore Evie, and your progress now should be the main focus. Find the negatives in your life, find any triggers, then begin attacking them, to either find a path past them or know you must avoid them.
Work on social skills, ie. begin exposure into crowds, functions, concerts, anything of large proportion, but do it in stages, get yourself back into society. These skills help with your general daily functioning skills, as they all intertwine as you!