User blog comment:B214/Question and Answers 6/@comment-3285616-20161201000001/@comment-29963364-20161201051821

The episodes of ecchi anime are always censored when they are first aired in Japan. It isn't until the episodes are available for private purchase (DVD & Blu-ray).

When Funimation got permission to dub and sell DxD here in the U.S., the uncut & uncensored episodes were already out and available for all to see. So they just dubbed those episodes instead of the original censored episodes.