title: RVM keeps installing the same rails version on different gemset
body: <p>I have rails 3.2.2 installed in the <code>global</code> gemset in ruby 1.9.3-p125 installation, and I need to test varils rails versions. When I create a new gemset, and install a different rails version, I get the same rails installed!</p>
  
  <p>Here's what I do:</p>
  
  <pre><code>$ rvm use 1.9.3@rails-3.1.3 --install --create
  $ gem install rails --version 3.1.3 --no-ri --no-rdoc
  $ which rails
  &gt; ~/.rvm/gems/ruby-1.9.3-p125@rails-3.1.3/bin/rails
  $ rails --version
  &gt; 3.2.2
  </code></pre>
  
  <p>And the result of:</p>
  
  <pre><code>$ rvm ruby-1.9.3-p125@rails-3.1.3 gem list
  </code></pre>
  
  <p>Shows the same list of <code>global</code> gemset.</p>
  
  <p>I echoed <code>GEM_PATH</code> and <code>GEM_HOME</code> and they both show the correct rails-3.1.3 path</p>
  
  <p>I'm running the following:</p>
  
  <ul>
  <li>Mac OS X 10.7.3 Lion</li>
  <li>RVM 1.10.3</li>
  </ul>
  
  <p>What's going wrong here? And how can I solve this issue?</p>