I'm pretty sure OrbaSynth only supports Orba 1 at this time (that's why it saves .orbapreset files). This is why it saves to the Orba 1 app folder. When you save however, you can click the Export button and just save it to your desktop. Later, move it into the proper place for Orba 2 which is /Users/<Username>/Documents/Artiphon/Common/..
I've been looking at .orbapreset and .artipreset file formats very carefully and they are very similar. I would say .artipreset has grown past .orbapreset. I can see how it would work for basic Bass/Lead sounds but Chords have special data to define the Chords. This is quite different in both file formats.
You'll likely have to copy the <SoundPreset> section out of the .orbapreset file you create and replace that in an .artipreset file that is setup closer to what Orba 2 expects. The Artiphon .artipreset files are located in /Users/Shared/Artiphon/Common/Presets
ah i see...