They are Catholics are they not? The Soviets cared nothing for the Uniate differences between Orthodox and Latins so these full Catholics (unless they claim some mutation) were placed under the Latin Churches until Soviet President Michael Gorbachev allowed these Uniates to reform. The Orthodox Church had nothing to do with it. In fact it was under the Soviets that the Uniates were allowed to reclaim Churches - while the Orthodox were still locked out of theirs.
Wholly Karp!! Dude be not afraid of the Dewey decimal system. It can be your friend.
But then again why bother. It's alot more fun to make up facts to suit an agenda.