[mothered]

I ordered 1 t-shirt and the earbuds, does  the quantity of items matter when doing it or im good?

In terms of the order quantity, It won't have a negative Impact on your SE.

In fact, It can work In your favor by drawing attention away from the Item you're SEing. For Instance, ordering quite a number of Items Is prone to picking & packing errors, and can also be a little difficult for the warehouse and administration/Invoicing department to trace each Item's movement when assessing your claim.