This issue has come up many times. I will place a portal (size varies) facing north and south, and I will light it with a flint and steel and the blocks will appear facing north and south. But when I repeat the process, only the portal is facing east and west, the portal blocks will still face north and south. I'm not sure if there's a command or there's something in the config.yml file, but this issue is very important. I've attached some pictures for reference:

Unrelated to MV-Portals.