By default, the Account Name Preference is to use the Subscription Name.  This can be changed in the Admin Settings page. 

Step 1 -  From the left side menu bar, navigate to Setup - Admin - Settings

Step 2 - Scroll down to the "Settings" section, and under "Account Name Preference" click the radio button next to Subscription ID

Step 3 - Scroll down to the bottom of the page, and click "Update Customer Settings"