I know that you are waiting for this feature since long time .... but I'm afraid that this may not be the case.
Actually the mp3 are not played in alfabetical order but in a different non-random order, that seems to have something to do with the order that I followed when copying files to pluto repository.
Say that I have a CD with 13 songs, I copied songs 1 to 13 in one shot, then I copied again song 2 (the file was not ok).
When looking at the subdir in Music section, the files appear in proper order, (i.e song 1, 2, 3 ....) but if I press Play all and then go to the remote the order is
So the last copied file is played first, no matter of alfabetical order, and it is always like this (i.e the order never changes)
The same applies when I make a subdir with some compilation of mp3, and then ad some more mp3.
Is it something that happens only to me?