Amazon admits it unintentionally hid competitors' faster delivery options and is working on a fix, after pushing back delivery on some items to April 21 (Jason Del Rey/Vox)

Jason Del Rey / Vox:
Amazon admits it unintentionally hid competitors' faster delivery options and is working on a fix, after pushing back delivery on some items to April 21  —  The company is working on a fix after Recode alerted it to the issue.  —  Amazon surprised millions of customers last weekend …