gem path reverts back to previous path

just recently installed ruby 2.3.0 and rails 4.2

ran bundle install for the first time and my app successfully ran from my local server.

added a few gems, and once again ran bundle install... it appears that my previously installed gems were once again being installed.

tried running rails server once again and this came out.

-bash: /usr/local/bin/rails: /usr/bin/ruby1.9.1: bad interpreter: No such file or directory

just making a wild guess here, but i think the gem folder is reverting back to my old folder which is ruby 1.9.1

any form of help would be greatly appreciated.