I've come across a strange issue. I'm using the exact same codebase to access the orders API endpoint for two different Shopify accounts, and one shop works perfectly (Canadian shop) and the other (our US store) is missing all of our order data minus 3 randomly spaced order dates.
Not sure what the issue could be, short of needing some sort of tech support directly from Shopify. Both using the same endpoint version and everything.
Oops, silly mistake. All the customers orders were archived for some reason. No issues.