Restoring archived versions and versioning

A document has a current version 0.3. Versions 0.1 and 0.2 are archived.
When a user restores version 0.1, the version indicated on the Summary tab is 0.1.
(I was expecting a new version 0.4 to be created, as it used to do with the previous versioning system)
When the user edits the document, the version numbers goes to 0.3+, even if the user checked "Don't increment version number". This can look like a bug, or at least a bit strange when the user doesn't know how the versioning system works.