What does it mean when a company reposts the same job after interviews...?

I interviewed for a job earlier this week. The interview went okay, nothing stellar but not bad either. I was told at the end of the interview that they will follow up with successful candidates for a second round of interviews and that the whole process would take another few weeks. Now, not even a full week after my interview, the job has been posted on another website with an application deadline several weeks out... What does that mean? Is it safe to assume I won't get called back for this supposed second interview? :/