Your voltage differential is large enough that it is unlikely to resolve itself on its own. The dealer needs to balance the array correctly and that will resolve the issues you are seeing
The reason some of the higher order numbers shipped first is a mix-up at the logistics company. Issue has been corrected and all remaining orders will ship in sequential order
Reason this happens is the update shuts down some of the communication busses in order to do the update. This makes modules freak out that they can't communicate so they go into a failsafe mode as protection, for instance running pumps at 100% duty cycle. This results in noises you don't...