[SalesForce] Creating a list view for custom objects

Using the default presentation mechanisms, only the object's Name field is presented with a hyperlink (that makes use of the object's ID). So to get that link back you just need to put back the auto-number field (which I assume is the Name field). There is no ability to control the default sort of remove the sorting. The positive of using these default mechanisms is that your tab behaves like many other tabs which is usually helpful for users.

If more specific behaviour is important to you, you can write your own Visualforce list page based on the StandardSetController and override the object's tab action to use that page. Then you can hyperlink whichever field you like and lock down the sort order.

From SF:

The Owner field on the detail object is not available and is automatically set to the owner of its associated master record. Custom objects on the detail side of a master-detail relationship cannot have sharing rules, manual sharing, or queues, as these require the Owner field.

So if you've been adding subscription records to an Account that someone else owns, the Subscription record will default to them as the owner, which means it wouldn't show up in your list view.