My default and current version of ruby is 1.9.3. It\'s actually the only version that appears when I run rvm list so I don\'t see how I can be messing that part
You can always edit which ruby is used by editing your Build command preferences:
subl ~/Library/Application\ Support/Sublime\ Text\ 2/Packages/Ruby/Ruby.sublime-build
Change the default "ruby" to whatever path you require. The version you're using at any given time can be discovered with:
which ruby
Alternatively you can just link to the default which is often located at /opt/local/rvm/bin/ruby.