No it happened many times.
No, it happened twice. It's also worth noting that there were always rumours that Jordy Chanadler's (first boy he paid off) father made Jordy make up the allegations. There were also recordings of the father saying he's going to "f**k Jackson up and make sure he never sells another record". Jordy and his father apparently stopped speaking not long after the big MJ trial. Jordy's father committed suicide not too long ago...not a single person attended his funeral. Make of that what you will, but I think MJ was taken advantage of by so many people, including family members. He had so much money and he was so naive. Even people who worked for him wanted a piece of his wealth. I mean, just look at his doctor!! Everyone around him was dodgy. I think he had a lot of issues, but I think he was just a very naive, misunderstood man who was able to trust absolutely nobody, and who people took advantage of.