In the 14w04a snapshot when eight rotation possibilities were brought in for item frames. The eight rotation values have also been applied to maps in item frames which means that the values 4, 5, 6, 7 duplicate the original 0, 1, 2 and 3. It is only a minor problem but if someone is using testfor to test for a specific rotation then they would have to test for both 0 and 4 for un-rotated and so on
Duplicate of MC-45892 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.