I know that this has been discussed in 2012 via the post - Issue with unbinding of configurations from old jars but even then there was no definite solution to this issue. I am facing the same issue now where my config does not pick up the latest snapshot unless I unbind and save.
If someone has an answer, please do help.
we did that a year ago.. but I was not on this project then. Adobe wasn't able to come around with a solution for this one then. Will do it again today.