As the title states, I got two orders over two days which were paid for then automatically combined.
There's a reason I don't combine automatically - because we ship many large, heavy fragile items which cannot be safely combined. When they can be put together, we do it manually then send a refund for the difference.
The system changed my settings to "any items purchased within 3 days can be combined", so now I need to figure out how to pack two fragile pieces along with one that'll crush them as it's not letting me separate the transactions. I'm also assuming eBay gave the customer a discount ("Combined shipping discount apply only to items listed in the currency you select.") and we'll be out the shipping since they most likely need to be shipped separately.
