A rotated coin can happen if the one die is set incorrectly or the die moves due to a loose set screw, the 1967 dollars had many helped errors. There was a really nice ICCS ms 65 upset die 1967 dollar sold at 2013 Winnipeg
RCNA auction for about 10000.00 plus juice and HST. The 1967 dollar is really cool coin with the goose flying upside down.