Attacked by pirate with significantly higher PR ranking

From what I understand, you can only attack other pirates within a certain PR range. If that is correct how can a pirate with ranking 555 attack me, when my ranking is 196. I have screen shot but am struggling to post it. Appreciate any thoughts on why this might happen.

Interestingly he had a 64% victory, but my PR did not change, and I could not revenge. Very odd all round I think.

 

Did you attack that player before? Maybe he revenged against you.

 

Not in the last day. Maybe before that, but I would be surprised if it was on a list before that.

 

This must be a revenge. Your PR didn't change because his PR was far greater than yours.

 

Also, above a certain PR, the attack ranges increase, or so we've been told.