I'm working with a teacher who is using Mastery Paths super effectively but we're running into one really sticky problem. When a Mastery Paths assignment group is updated, instead of adding an "Assign to" group on the assignment, it is updating and removing existing due dates. This wipes out the due dates already in place and requires the teacher to pay close attention to when things are submitted, etc, so dates aren't messed up.
Is this a problem other people are seeing? Is it just a problem with the way the pathway was set up? I'm having a hard time replicating it in my test account.