Confusing Widget of inline entity form Inline Entity Form ships with two widgets as Inline entity form - Single value and Inline entity form - Multiple values when I use Inline entity form - Single value, I only get add entity form and when I use Inline entity form - Multiple values I get option to add/edit both.

what I was expecting to see to have both add/edit with Inline entity form - single values with only difference of not allowing to have multivalued field in this case.

Am I missing something?
If you modify your inline entity form by writing a small module, (for this look at README and the ..api.php) you can set your default values by loading them from the entity. So your former entries are available.