[O] automagically changing roman enumeration to alphabetical

[Paul Rudin]

I was surprised by this behaviour.

Find a new org-mode file. Type "i)" and then hit M-Ret. The "i)" gets
renamed as "a)" and "b)" is added on the next line. 

I would have expected that we get "ii)" on the next line and the "i)"
would be left alone.

Is this working as intended?