He was a Protestant/Evangelical pastor evangelist who formed a new Protestant/Evangelical faith group, happens every year. I think many of them are cults too. That is why I ask obsessive antiCatholics which of them they belong to. I occasionally get a straight answer. Most of the time, a denial, a denial, a denial.
But if the path one took in leaving one faith for another means the original faith was correct, then those who left Protestant faith for a path leading to a Catholic faith are wrong. And you have testimonies of Protestants doing so. And they are wrong, but not due to that logic.
You have many Caths who leave that faith for another every year, but which you would not allow to impugn Rome.
It is not the path that necessarily determines the validity of the final destination, as some take a long path to what both of us would consider a good church, or a wrong one. What one leaves for another is the issue.
And though a path may not be straight, in this case we see the opposite of upward progression, as none of those churches are Evangelical in it historical sense (one may be evangelical within such) unless the Presbyterian one he went to was, as the Methodist Episcopal Church is a mainline Protestant Christian denomination in North America, as is the Disciples of Christ , and which is not the Christian Missionary Alliance as you stated, and which even allow Jim Jones to be part of its loose clan.
Finally he goes cultic, as while the SDA, though conservative, yet it is fundamentally elitist (though it has an ecumenical sect), and historically has been so, with and its denial of eternal torment and insistence on the necessity of keeping the seventh day sabbath and dietary laws is contended against by evangelical ministries and places them outside the camp of classic evangelism.
And there is the idea that historical descent equates to assured veracity, and that it necessarily must thus be wrong to disagree with leadership and leave when rejected in order to keep historical faith, but which idea cannot be sustained. The validity of Truth claims rests upon Scriptural substantiation, not historical pedigree.