I'm doing this with her permission as she wants me to update her daily on her texts, phone calls, email, facebook posts so she can respond back to people. In fact that's usually a part of our telephone conversations.)
Maybe it's time to tell her you aren't going to do this anymore.
There's a reason people in rehab don't have access to all this distracting technology - cellphones, facebook, text messages etc - it's so that they can focus STRICTLY on their recovery and themselves. Drug addiction is a serious problem and it requires a lot of HEAD WORK to recovery. And recovery has to be the HIGHEST priority in a person's life. Not new "boy" friends. Not facebook. Not phones messages. Not texts.
Rehab is emotionally draining and should be the focus of all her attention. She has a lot psychological work to do and Facebook isn't part of it. Perhaps it's time for you to distance yourself a little from what she's doing or not doing right now. Only time will tell how committed she is to her recovery and your relationship. Only time will tell if she's done lying and turning over a new leaf.
Have you considered that you can back off a little and focus on yourself and your recovery from the trauma that her addiction has caused you? Her Facebook updates can wait.... until both of you are in a better place psychologically.