Mine does this too, just a little bit. It'll do it from the first stop on a cold morning. Seems to start off in 2nd gear for a few feet, then drops into first a bit abruptly. My car has had the valve body updates done. I don't really consider it bothersome - I've yet to drive a car in which the auto tranny behaved exactly the same cold vs. warm.
I had the transmission controller changed in the first year of ownership as well. The "odd behavior" was the transmission locked itself into limp home mode and would not shift out of 2nd gear. Top speed, 30MPH. Took 2.5 weeks to get the parts in from Europe - apparently there was a run on those little puppies.