My experience with all of the Tesla staff I have interracted with is that they are more invested in the product than any other organisation I've ever dealt with. They know they have a fantastic product and they are genuinely excited to get it in the hands of the customer.
Unfortuantely there are many areas that they just have zero visibility over and it's even questionable how much visibility head office have. They are a small player in the grand scheme of things compare to other auto exporters, they are at the whims of the contracted logistics, including shipping, road transport etc (and you have to remember how badly impacted worldwide shipping is at the moment).
I don't know how they have to contract the logistics, however my guess based on what I've observed is that they contract a logistics agency to book space on ships, road transporters etc, and it's that companies job to get the vehicles from the factory to the delivery center. That would explain why you see vehicles spread over multiple ships, especially at the moment with the above mentioned shipping issues, limiting the number of RORO's available and also the fact that Tesla don't really know which order the vehicles will be loaded/unloaded and transported, etc.
They are just not big enough exporters as yet to be able to justify owning parts of the logistics chain, or having the clout to make demands of the logistics system.