Interesting. I've been doing addiational testing for this.

It seems that you can schedule multiple snapshots to occur for the same snapshot volume (ie. one at 2:00 am and one at 12:00 noon) and it takes the first snap but when the second one rolls around nothing happens. I've looked through logs for errors and I can't find it. Which one should I look for? If it's using LVM to do snapshots (which it looks like it's doing) those errors should be in the system log (ie. messages). Where can I find that?

Is this expected or should I not be able to schedule more than one snapshot for the same snap volume?