Though you can probably read some/most of this in the eutelsat document, this is what I found out learning about diseqc switching:
The word 'committed' derives from the fact that diseqc 1.0-switching is in fact compatible with (so: committed to) other (older) methods for switching band, polarization, position and option.
Diseqc 1.0 is therefore compatible with 13/18volt switching; 0/22kHz switching; and toneburst switching. (For switching on option-command, there is no other (older) way of switching than via the diseqc protocol.)
The LNB-switching between band and polarization is very very rarely done with diseqc though, I believe. The old switching method prevails there.
The uncommitted switch-commands can be used totally free, in any way you like.
There are 2^4 switch possibillities in uncommitted switching, so even 16/1 switches exist!
Combining them with committed switches, even more possibillities arise.
The switches can be used parallel or serial (cascading). In serial use, the order is not important, as long as the diseqc commands can reach them through the cascade.
Therefore your receiver should be able to give the commands in the order of your switches, or be able to repeat commands.
Most receivers use as standard order: first uncommitted command, then committed command.
Be aware with 8/1 switches: some switch purely on uncommitted commands, others switch on a mix of committed and uncommitted commands. With some you can set the (wanted) switching mode. Some even can switch on diseqc 1.2 commands!
With 8/1 or 10/1 or 16/1 switches switching in combined 1.1/1.0-mode: I don't know if the order or repeating is important there; never seen that tested. As ONE IC(chip) inside will receive all the commands for the switching, my assumption is that order of commands is irrelevant, and/or repeating commands is unnecessary.
Not all switches can endure motor-current. So be carefull there: chose your switch and/or motors wisely! (The faster the motor, the more current used, usually.)
Greetz,
A33