It’s not complicated. All the Newsmax story said was that NPR had two sources. It doesn’t identify the sources. That is not inconsistent with Ruddy being one of the sources. In fact, he WAS one of the sources. If you read my links you will see that NPR only had two sources: Ruddy and an unnamed official.
Your link is June 13th. That story cites an NPR interview on the 12th. And again Newsmax is Ruddy.