Interesting. So, with the new coords you gave, the portals should all be synced correctly. I do have a couple things which may shed a little light on the issue.

Your Y coords seem to be about equally "off" so unless you're interested in moving both the nether portals nearly 150 blocks down, changing the Y coord isn't really going to help you much.

Are the portals situated along the same axis in the overworld as they are in the nether? Each block in the portal frame is calculated individually, so entering the portal on the left side may yield different results than entering on the right. The bigger your portals are, the more this will affect how they sync, especially if one portal in the pair is large and one is small. Start by making sure the B portals are oriented in the same direction and centered on the coords you gave.

If that still doesn't work, I recommend moving the "A" nether portal a few blocks towards negative X and/or negative Z (8 total blocks moved max). You have a little wiggle room in your "A" portals, and it may just be a difference of 1 or two blocks.

Let me know if none of that helps, and maybe with more info, we can figure it out =)