I have done this kind of job for the purple portal (always heavily bonused!) I recommend using tally marks when doing your inventory count.
After setting the featured titles that are by themselves in a slot, most of the rest are "Any title" slots. I grab a handful, add a tick mark to the appropriate place on the inventory sheet and put them back. Just like dorseyp said, you would be surprised where things end up and you never know how many of a title you have until your are finished!