Pilot TV episodes that are duplicated

What's the policy regarding pilot TV episodes that already exist on the site as part of another series?  For example, the BBC had a long-running series called "Comedy Playhouse" that began in 1961, and several of the episodes were later regarded as pilots for TV series.   I have seen many of these "pilots" added to the series themselves, meaning they are duplicated on the site.   Is this acceptable?

Here's a couple of examples:

http://www.imdb.com/title/tt0398241/combined & http://www.imdb.com/title/tt0759869/combined

http://www.imdb.com/title/tt0308040/combined & http://www.imdb.com/title/tt0943531/combined

there are plenty more!

Thanks for any feedback.