CS_REST_Wrapper_Result::was_successful() returns true, but subscribers aren't added

[rbenvenuto]

I am adding subscribers through $wrapper->add($subscriber) method .

Then I check for $result->was_successful() and it always returns true, but only a few subscribers are actualy added to my subscriber list.

It means i'm returning successful messages to my subscribers, but their emails aren't actualy added, only a few ones!

I've searched through my whole code, flushed cache and added exception treatment, but no exceptions are thrown at all, the return from $result->was_successful() is always true.

Can anyone help me with this issue?