Nether Spawns: Y Axis Relevant?

Alright, I have two spawns in the Normal World:

one at: (which I will call Main)

x: -22
y: 65
z: 261

and another at: (which I will call Tower)

x: 17
y: 244
z: 296

Yes, I know that I should have a distance between the two portals of 1024 on either the x or y axis, but shouldn't the scan in the Nether pick up the closest portal within a 128 block range?

Get this...

Main translates to:

x: -2.75
y: 8.125
z: 32.625

and Tower translates to:

x: 2.125
y: 30.5
z: 37

... in the Nether. Now, in the Nether, I have constructed two portals:

One at: (which I will call nMain)

x: -2
y: 60
z: 31

and the second at: (which I will call nTower)

x: 2
y: 67
z: 36

Now, Main links to nMain and Tower links to nTower, yet both nMain and nTower link to Main. I can't get nTower to link back to Tower, which is what I want.

I have:

Tower -> nTower
Main  -> nMain

nMain
      } Main
nTower

..but I want:

Tower <-> nTower
Main  <-> nMain

So, here is my question. Have I configured my Nether portals incorrectly in some way (as in, is Y-Axis now relevant?), or have I simply placed my Normal World portals far too close together (which would suck)?

Thanks everybody!

minecraft-java-edition

Pictures about "Nether Spawns: Y Axis Relevant?"

Nether Spawns: Y Axis Relevant? - Red Wine in a Clear Glass

Nether Spawns: Y Axis Relevant? - Rocky Shore During Sunrise

Nether Spawns: Y Axis Relevant? - Gray and White Concrete Building on Green Grass Field

Does Y axis matter with Nether portals?

Get the x and z coordinates of your nether portal. Y coordinate does not matter, but positive and negative does. In this example the coordinates are 225, 22. Divide those coordinates each by 8 to determine the coordinates in which to place your new nether portal in the Nether.

What Y axis do Nether fortresses spawn on?

Nether Fortresses are more likely to spawn on the positive side of the X-axis, therefore moving north or south while keeping the X-axis positive is the best way to search for them.

Does the Y coordinate change in the nether?

The Nether and the Overworld's coordinates don't line up in a 1:1 ratio, as distances don't work the same in the two dimensions. Instead, the ratio is 1:8, meaning that traveling one block in the Nether equates to traveling eight blocks in the Overworld (although this doesn't apply for the Y-axis).

Spawn-proofing a Nether Hub! ▫ Minecraft Survival Guide (1.18 Tutorial Let's Play) [S2 E58]

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Cup of Couple, Brett Jordan, Anthony Beck, Anthony