Yes you are right that the legato do not work in poly mode.
I think it's common for all VC5 applications that has legato and retrigger options.
I would like it was - and think it should be possible to choose legato and retrigger mode also in polymode. So can you please fix this too Arturia?
Check this too about request for note prority:
http://forum.arturia.com/index.php?topic=87969.0You can perhaps get more info in the original manual about things thats original. Just remember that there are some things the original can do that the Arturia V can''t do, and the other way around too. For instance the hardware synth is monophonic.
There are different manuals around the web. Also a patchbook is to find. A place to find this is here:
http://soundprogramming.net/synthesizers/arp/arp-2600/Just scroll down the page to find the links.
Usage on your own risk.