parallel echo {1} {2} {3} ::: 6 7 ::: 4 5 ::: 1 2 3 : results out of order?

[George Marselis]

hey guys.

i executed  the above example from the manual in my bash shell.

i got back the following results: 

[gmarselis@4jane ~]$  parallel echo {1} {2} {3} ::: 6 7 ::: 4 5 ::: 1 2 3

6 4 1

6 4 3

6 5 1

6 5 2

6 5 3

7 4 1

7 4 2

7 4 3

7 5 1

7 5 2

6 4 2

7 5 3

i would have guess that { 6, 4, 2 } would have been produced right before {6, 4, 3} . is there no guarantee on the order of the results returning?