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Revisions are doubled up when editing.
I've created a content type which forces a new revision on every node save - this is so we can log who has edited a node (in this case the node is a stock transfer).
This module is very useful in that we've only enabled the user to alter a single field called 'status' - they can change 'In transit' to 'Delivered'.
However, when the node is saved it looks like two revisions are being created - possibly the node is being saved twice somewhere?
BTW - thanks for the excellent module - invaluable in our case.