Two Phone Numbers

I'm still hoping to find an answer to this issue. I have two phone numbers, one is our home number, one is a line dedicated to a fax line. My problem is that the number dedicated to the fax line is the default number when I click on the "Voice" tab. I have to go to the drop down menu to access my home number. This is also impacting my ability to use "Voice2Go". The phone number that I have listed under "Voice2Go" is my fax number. Under current circumstances, I can't change that number to my home number. I'm hoping someone out there can help.