Many of those with a predisposition for substance abuse end up developing additions to multiple intoxicants and/or behaviors. As a result, when you are transitioning to sobriety you will likely relate to members of more than one recovery fellowship. You should absolutely participate in any fellowship in which you find relatability, but there are a few caveats to keep in mind so you can properly work your program of recovery.
First and foremost, you should only have one sponsor at a time, and that sponsor should be leading you through the steps according to the specifics of one fellowship. Attempting to work with multiple sponsors, or indeed work the steps multiple times simultaneously, may seem like it would be a boost to your recovery, but this is not the case. You would be placing far too much emphasis on one facet of your recovery program while garnering little benefit, as all of the steps in every fellowship are geared towards a common goal. Working the steps in multiple fellowships or working with multiple sponsors will not aid your recovery, but would detract from your ability to live a balanced life in sobriety.
Another concept to bear in mind as you formulate your program of recovery is, again, to seek balance in your life. Obviously, fellowship in the rooms of AA, NA, or whatever 12-step based group you relate to is an important part of your program, but it should not be an overly dominant part of your program. Successful sobriety comes from seeking and establishing a healthy balance in life, feeding every part of your health - mind, body, and spirit. Fellowship feeds your mind and spirit, but it should not be your only source of nourishment for these areas of your health. Talk to your sponsor about the best way to go about incorporating multiple fellowships into your recovery program. This can be accomplished without detracting from your progress in life and in sobriety!
For every addictive behavior there is a 12-step based recovery fellowship, and indeed many of us develop multiple addictions during the course of our using careers. You may therefore find yourself drawn to multiple fellowships in your recovery. This is a good thing! You should seek to build a support network to which you relate, and this will likely mean forming relationships with members of more than one fellowship. Do not hesitate to do this, just remember that fellowship is only one facet of your recovery program, and working the steps is a process to be conducted within one fellowship with one sponsor at a time. So long as you keep these things in mind, you can proceed confidently and build your support network to suit your needs, multiple fellowships and all!