Stash branch changes

When I select a branch in my (in fact any) Stash repo and save and then edit that branch it has changed to a different branch

See screenshots for examples ...

• The first screen shot (Correct-Branch-Selected) show me selecting the correct branch before saving.
• The second screenshot show after I've saved and then edited

This is not just a presentation issue - if I run the build it checks out the WRONG branch - the one I didn't select