I think you are confusing Minor version and Patch version.
From http://semver.org/ :
Given a version number MAJOR.MINOR.PATCH, increment the:
MAJOR version when you make incompatible API changes,
MINOR version when you add functionality in a backwards-compatible manner, and
PATCH version when you make backwards-compatible bug fixes.
This leads to the following "rule":
- A Release branch should contain the MAJOR and the MINOR number (e.g. release/1.9)
- A Hotfix branch (which contains bugfixes) should also contain the PATCH number (e.g. hotfix/1.9.1).
As a side note, there is no "right" or "wrong" and semantic versioning has no knowledge of your git workflow, so in the end the only thing that matters is that you and your team can work with it.