Trouble with default settings at online stores - PC World

As an Amazon Prime member, I pay a yearly lump sum that entitles me to free two-day shipping for my many Amazon purchases. But six months ago, I noticed that small shipping charges were appearing on my bill at checkout; free two-day shipping was no longer the default choice on my purchases. Instead, a check mark ap­­peared next to the option for paid overnight delivery.

I hadn't told Amazon to send the items overnight, so why had the company made this my default? Regrettably, many of the default choices that Web sites make for consumers are good for them, but not for us...