Thanks so much for your generous donation. 

I have also been thinking about a better way to do it.

I finally decided to make a change to the Sonos plugin that should help. So I've added the option to get the volume back in LastResult for the actions that adjust volume.

I should be releasing a new version soon with this update in it.

Version 2.2.2.6 is now available:

http://voxcommando.com/home/downloads/

http://voxcommando.com/mediawiki/index.php?title=ChangeLog#Version_2.2.2.6