That last spike could be due to your promotion. You might see a further adjustment up next week.
I also get the sense this year that the merchandise adjustment for the new season was delayed a week, and that the 5/21 lower point from this season is what usually occurred on the monday of the season rollover. I had no real change, but I was expecting a nice boost after my home drafted trainees had decent sized salary increases. BB-Marin essentially said (here or in the similar thread on the "Bugs" forum" that this week would be low, and it would increase over the next few weeks, with the largest rise during the 5/28 econ update. So there's hope!