I have dealt with coins for over 35 years. The dies to make a coin or silver strike are made with one obverse and one reverse. I have also dealt with many World Coins that were bi-metal and all the dies were and are still made the same way. The only way these so called errors could come out of thier respective mints is for someone in the mint itself to be playing with the strikes, like finding a loose insert and rotating it. Or if for some reason the insert fell out after the minting process and they replaced it out of alignment. This would not be considered an error. The inner silver portion of the strike is put into the outer ring in a separate operation. They are then put in the press in one piece and stamped with two dies, one obverse and one reverse.

The mint would never make four dies, two for the Silver and two for the Brass ring. The economics of doing such an operation would not justify the cost of making a Silver Strike.

The only errors on Silver Strikes are when the complete Reverse or Obverse is rotated 10, 15, 45 or 90 degrees.
My two Cents on so called errors.