title: Git/Sourcetree basic branching and merging
body: <p>Newbie question alert!!! I am just starting to get into using Git, and particularly Sourcetree which seems like a good application for visualizing it. On my first test it went along pretty well, branching and merging (see the top diagram). I know this structure means I'm using the development and master branch the wrong way round, but that's fine because at least it worked.</p>
  
  <p>On my second try though, I couldn't seem to visualise any branches, even though work was being  done in both of them they seem to appear in one single branch (with a '7 ahead' note), and when I try and merge nothing seems to happen. Hopefully the second screenshot is enough for someone to tell me what is happening here? If not I will try and give some more info. </p>
  
  <p>I'm just playing around at the moment, so still getting to grips with proper workflow, just trying to get the basic branching and merging actions to take place in a consistent manner through Sourcetree. Any help will be appreciated.</p>
  
  <p><img src="https://i.stack.imgur.com/eeoPx.jpg" alt="enter image description here"></p>