This might help you a little further. I remember this thread in "Answers" (I stopped writing there to support the forum).

http://answers.presonus.com/15721/how-to-re-order-the-dca-groups-of-the-cs18ai

Hi Whaler
In one of your answers you mentioned

StudioLiveAISoftware_ReferenceManual-EN-V5_09032016, chapter 4.4 "Managing Filter DCAs":

You can reorder the Filter DCA list by clicking or tapping on the Reorder button to the left of it and then clicking or tapping the Reorder button next to the position to which you would like it to move.

That's what I read as well. But this simply does not work that way. At least not with UC Surface 2.1.1. Does it really work that way for you.

Just checked it - it might have changed, but it has not. It works exactly as the manual says. You should consider

a) that all groups need to have some content (at least one channel selected)

and

b) allow your device (iPad, computer) 5 seconds to follow your commands. UC Surface can be slow, especially on old iPads...

This is why I wrote that you should think BEFORE, what you need for the next event or task. As I am working with a CS18AI mostly, there are 16 fader in the DCA bank, so there are 16 DCA groups stored in my "personal" zero out scene:

01 DRUMS
02 KEYS
03 BASS
04 GUITARS
05 VOCALS
06 --
07 --
08 --
09 --
10 --
11 --
12 --
13 FX A RETURN
14 FX B RETURN
15 FX C RETURN
16 FX D RETURN

The DCA groups are empty, but the CS18AI makes it very easy to select the channels: It has a matrix for this purpose. If there are more instruments like a brass section or percussion, I simply rename groups 6 and 7 and select the appropriate channels.

06 BRASS
07 PERCUSSION

Of course the names have to be shorter because of the limited display space in UC Surface and the scribble scripts. Usually I have the DCA groups filled when I come to a event, but this system makes it really easy to fill the DCA groups even if the concert has started already.

Working with already arranged DCA groups also makes the use of UC Surface easier. I always turn the "Show Auto Filter DCA Groups" on the settings page to OFF. Others may like automatic DCA groups. Do what suits you most.

Thanks again for your reply. I do not use auto filter dca's since I'm using it for different scenes of a theatre. All DCA are filled with at least one channel. But last night it definitely didn't work the way, as descibed in the manuals. I'll give it a try agin tonight. Due to my trie last night the order is totally messed up. So nothing to loose

Hi all
I don't know what it is, but on UC surface 2.1.1. it's definitely not working the way, as it is described in the manual.
If you click on one entry and the move to where you want this entry to be placed, you almost can't predict, where it will move. I have more than 16 DCAs, since it is for a theatre production. Maybe it's a software bug or whatever. Since premiere is soon, I will not give any other tries. But maybe there is somebody out there, who could check this issue, also with way more than 16 DCAs. Thanks in advance.
Maybe a presonus guy is reading this and can give an answer.