So there are now 2 postgres servers running and I can't connect to the /Library/Server/PostgreSQL For Server Services...
The reason for this is that psql is pointing to the original location of the socket directory. By simply shutting down the 2nd instance of the Postgres database and linking the running socket in the original socket directory - you can connect to the /Library/Server/PostgreSQL for Server Services instance.
1.) launchctl remove org.postgresql.postgres
2.) launchctl list | grep postgre
3.) ln -s /Library/Server/PostgreSQL\ For\ Server\ Services/Socket/.s.PGSQL.5432 /var/pgsql_socket/.s.PGSQL.5432
And you can connect to the database you need by:
psql -U _postgres -d postgres