I formed an alliance with a couple of people.
It was the final 5 and i was HOH. i nominated two that weren't my alliances but the person i nommed had POV. so it was down to my two alliances. I thought they were both faithful so i was in a bit of a pickle. After doing eeny meeny miney mo i nommed gx and he got evicted bless him. Turns out the other two (including my 'alliance') were in an alliance together therefore i got cheated into 4th :/