kreuky, did you read the "rule" incorrectly? (I assume you are reading this from the Comments section of this blogpost).
"You are not allowed a stopover for an award within a same region". It's poorly worded but what it is saying is that if your award is completely within a single region of the award chart, you are not allowed an en route stopover.
This is why for Australian domestic (or AU/NZ or AU/Pacific Islands) itineraries redeemed using US DM, you can't have a stopover (remember, there is a difference between the en route stopover and your destination; the latter one you always have!)
Usually a minor point and sometimes it slips by, but keep in mind that in continental US/Canada/Alaska, a US DM stopover is defined as a stay of more than four hours unless there is no scheduled connecting flight within that time frame. This is not a big deal most of the time, especially if you planned a stopover anyway, but if you are merely transiting it can be (consumes your stopover / another stopover, killing your itinerary).
The only inaccuracy from that old blogpost now is that AA have eliminated stopovers on their redemptions.