I recommend you switch to ShadowSpawn:
http://github.com/candera/shadowspawn. Hobocopy has a sort of half-baked copy tool built into it; use shadowspawn to launch something like robocopy or rsync, which are much better copy tools. Copying files turns out to be a hard problem, so ShadowSpawn is just the shadow copy part of hobocopy, with the ability to farm out the rest to some other, more capable tool.
That said, I don't really support either hobocopy nor shadowspawn any longer, as I use Windows only for gaming.