When I go back to my nether portal instead of coming out to see my house I come out of a portal on the other side of the mountain that I didn't make

I built a portal in a house inside of a mountain and then when I moved to a different location outside of the mountain because I wanted more room and an easier life I broke my nether portal and placed it in my new house that also leads to an old compartment underneath my mountain (and that's where I placed it) Then I went through It and everything was normal but then when I came out of It I was in coordinates -13 79 -88 when MY portal is in coordinates 142 51 -110
The next thing I did was break all of the portals including the one in the nether and then three portals came along four different times when I broke It in coordinates -29 71 -90 first, then -22 71 -85 second and, then -13 80 -88 third and then -12 80 fourth. Those are all the coordinates on the inside of the portal and their ground level. I hope this was descriptive enough, ha I'm sure it is
Please fix it and take your time, I don't want to rush you into doing this.