Covid-19 diary : online ordering

Went onto Amazon to order more of a consumable item that I’ve been buying for a while now.

Click Add to basket, quantity 1

Error message: Minimum order 2.
The item appears in my basket, but with quantity zero.

Increase the order quantity to 2.

Error message: This seller has a limit of 1 per customer.
The item now appears in my basket with quantity 1.

Proceed to checkout.

Error message: Minimum order 2.
The item now appears in my basket with quantity 2.

Proceed to payment.

(At least it didn’t get into a loop.)