There appeared to be several issues of conflict at hand between the newly immigrated Unia and the American Catholic church, e.g. the private ownership of church property, self-administration, and preservation of traditions. St. Alexis Toth led his parish into the Russian diocese and paved the way for 80 other Uniate parishes that followed.
I'm only speculating--you may say that he came to Orthodoxy by for reasons of "convenience," but the difficulties he encountered with the uncomprehending Catholic hierarchy may have brought him to a greater understanding of the ecclesiastical error inherent in the Catholic church, and drew him into the true Church. Who are we doubt the integrity of a persons oath when they renounce the Papacy and embrace Orthodoxy and preserve that oath until their race has been run and they join the Church Victorious in Paradise?
There is a section dealing with the Unia and Alexis Toth in the 9th paragraph in this essay's section entitled "The Beginnings of Orthodoxy in the United States":
http://www.christthesaviornyc.org/bkshe ... yOCA.shtml