2X portals at certain heights are not linked (sorry i use translator)

I passed my nether portals above, a few blocks before the bedrock in the nether and they are linked with those of the over world but when I pass through the over world portals it does not transport me to the corresponding portals, but it takes me to the starting point of the nether (where I entered the first time), and no matter what portal is it always brings me to that point, but if in the over world I put my portals higher if they are linked, I returned my portals to the normal height and their media same (sorry if my message is not very clear due to the translator)

link of video https://drive.google.com/file/d/1RMC2ui6JoDcWA63e1Xi-xgycdiABkyP8/view