I was just accepted for the Masters program where I also received my undergrad. However if I decide to pursue a PhD, I will look for a program elsewhere. I agree I think it is important to diversify your experience and and program.
I received the same status on my university's website. I called the Graduate School office (not my specific department) and they said the department has made a decision and it is pending under the review of the Graduate School. This person/people have to approve all decisions so it adds a few extra days to the process. I should receive a status update online by the end of the week and the decision letter will be mailed that same day. Hope this helps