A lot of "our system just works this way" which causes headaches in several areas.
For example, I placed an order for in-store pickup, but when I arrived, they hadn't picked the item yet. I said I could just grab it and bring it to the counter, but they couldn't do this because "our system doesn't allow it".
They refund purchases made with dividends by mailing a check without contacting you, despite this not being in their online T. O. C. They cannot refund dividend purchases in another way, again because of "our system won't allow it."