Hi Flavio,
The playlist file is populated as source streams become available to the EMS. If all the streams are available when the createHLSStream command is issued streams will likely be in the order in which they were specified in the command, but that is not guaranteed. Each individual stream is responsible for adding itself to the master playlist, and so there is no inherent organization of that file (i don’t believe the HLS spec requires one either).
What you could do, however, is make a copy/paste of the master playlist.m3u8 file and hand-modify it. The master playlist does not change (unless you add or remove source streams). You can then have an alternate playlist (perhaps Globo.m3u8?) that you direct your iOS clients to.
Bryan