Nether portals are broken. Usually if you were to go 128 blocks out from your main portal and create another portal then go through it, it would generate a new portal in the Nether. This does not happen. I went out hundreds of blocks and created a new Nether portal. When I went through it, it put me at the portal that was made for a different portal in the overworld. The main portal, that is hundreds of blocks away from my new portal.
That is just one of the problems. The second one is that if I made a portal and went through it to the Nether, then went through it again it would generate a new portal in the overworld. But if I went back to that portal in the Nether and went to the other side of it and went through it would put me back to the original portal in the overworld. And sometimes it's vice versa, I go through and into the Nether and then back into the portal and I come out at the original portal. But if I go to the other side and go through it, it will generate a new portal in the overworld. This really messes with my plans for a Nether network, please fix if possible.