Yes, but it's the place that "or" has in the list that is telling. A list is built up of A B C D conjunction E (I've left out all commas to avoid for the moment the Oxford issue).
If it's a complex list, you get conjunctions inside some or all of the possibilities too. In other words, any of A-E might be replaced by either "G or H" or maybe "I and J". For example, when some of the guests invited to a party were couples:
John, Mark and Sally, Liz, Jane and Peter,...
However, that doesn't alter the need for a conjunction between the last two list items. So, if the final guests were Dan and Mary:
John, Mark and Sally, Liz, Jane and Peter,
and Dan and Mary.
In the article in question, the only conjunction occurs before distribution. Therefore:
- Distribution is the last item in the list
- Distribution is distinct from shipment
To avoid this conclusion, you'd need another conjunction preceding shipment. The Oxford comma debate is secondary and, in this instance, a distraction in my view.