Dashboard Shows Same view for 2 VistaCam HD cameras

I installed 2 VistaCam HD cameras one in the Hall entry and one in the dining room. It was working fine for a few days but now both cameras in the dashboard show the hall entry view. I went into the advanced settings and the MAC addresses are different but the IP addresses are now the same - they use to be different. If I change the dining room IP address, I get a message that the camera is not operating. I’m remote so I can’t reset the camera. Anyone come across this issue or have a solution? Thanks.