Talk about "double tagging".... that is exactly what you are doing with 3 phases for direction changes of 500KV and 750kV circuits.

Learn how substations are laid out with different voltage switchyards and transformers between them, and then you'll have less conflicts in your mapping.
This area is extremely complicated, doesn't follow rules & still needs more corrections... including 110kV mapped as 35kV erroneously.  https://openinframap.org/#13.03/56.73856/36.77435