I had the same issue, and RESOLVED it following the suggested Registry hack here: Strange behavior of Windows Azure Compute Emulator (SDK 1.8) with multiple role instances on a clean machine with VS2012 but WITHOUT VS2010
Anyone with this issue, please pile onto this connect log for MS to properly fix: https://connect.microsoft.com/VisualStudio/feedback/details/773786/azure-sdk-1-8-binds-several-web-roles-to-the-same-port-on-local-emulator