[Mediawiki-api] new bug in category members query?

[Minh Lê Ngọc]

I'm having trouble with querying English pronunciation from commons by my
bots. Take a look at queries below:

   - title=<http://commons.wikimedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:English%20pronunciation&cmlimit=20>Category:English
   pronunciation<http://commons.wikimedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:English%20pronunciation&cmlimit=20>
   - title=Category:English pronunciation&cmcontinue=used
to.ogg|<http://commons.wikimedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:English%20pronunciation&cmlimit=20&cmcontinue=used%20to%7C>

There are 4 items appear twice in these 2 queries: wherewithal, wires, wire,
wired and items are sorted in no order.
What's up?
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