Mine certainly behaved somewhat like yours Jeff. During the first 12 days I saw some small drops in ammonia that resulted in a little bit of Nitrite showing up. Specifically:
(looking way back in my log in Feb/March)
Day 1 - Ammonia seemed more like 4ppm, the the 5-6ppm I was after (at the time)
Day 2 - Added a few more drops of Ammonia hoping to make it just slightly darker than 4ppm
Day 5 - Ammonia looks same, slightly above 4ppm
Day 7 - Ammonia now looks more like 2ppm, slightest hint of NO2 showing up
Day 12 - Have Ammonia back at 4ppm, NO2 now definately 0.25ppm
Days 14 & 15 - exact same results as Day 12
Day 19 - "Kickstart" water change (recommended by members here) 70% water change w/cond.temp-match,amm
Day 22 - Ammonia 5ppm, NO2 at 0.25ppm
Day 23 - NO2 at 1.0ppm (!) Ammonia: 5ppm, (pH has been about 7.2 all along)
Day 26 - NO2 at 5.0ppm, Ammonia 0ppm, pH crashed to 6.0, NO3 10-20ppm
That takes you up to my Nitrite spike and my first big Ammonia drop to zero. As you can see, I saw some small amounts of Nitrate along the way and some small ammonia drops along the way, but when the changes came, they were dramatic.
~~waterdrop~~