Nether Gate problems, need Minecraft help?

Nether Gate problems, need Minecraft help?
Added (1). I built my nether portal, but when I entered the nether, I was suspended like a million feet above a giant lava lake as far as the eye could see. So I came back, tore down the gate, and then built it somewhere else. However, when I try to leave the nether, I don't go back through the new gate. A gate has spawned in my village near where the original (faulty) gate was; so I end up with two gates.

Read more: Nether Gate problems, need Minecraft help?