When you brought in your x-ref did you bring it in at a World Orientation... Did you move your World orientation in your original drawing? Some of these things could affect rotation.  As far as changing your hatch pattern are you x-reffing these as an overlay or an attachment?  You could also trey and see if your drawing has that associated hatch loaded into it.  sometimes it is just a small minisculle things which causes big troubles.

hi all....