When you create nether portal in overworld it spawns in nether incorrect regarding chunks, the position of the portal in the chunk does not match in two dimensions. 

What I expected to happen was...:
The position of the nether portal in the chunk must match in two dimensions.

What actually happened was...:
The position of the nether portal in the chunk does not match in two dimensions.

Steps to Reproduce:
1. Press F3+G
2. Build nether portal in overworld
3. Enter the portal

4. See portal position in chunk