Upset Rotated Coins!

There's a 50c rotation when the blank doesn't engage in the collar (ramstrike) at first and is struck forcing the blank into the collar making "lugs" which , I think a pic you are looking for is here:
http://www.australian-threepence.co...n-error.html.

Then there's rotataion if the planchet doesn't engage in the collar at all and is struck entirely without collar (I've spilled the beans -see upcoming article of out of collar 50c in February CAB mag).

Neither of these are upset. An upset is where one die rotates -the orientation is different for the reverse and obverse dies which shouldn't happen as the dies are keyed into the press.
(A luck would have it the key doesn't show in the image but is a flat area at the side of the base of the die)

So, in normal people language...
If you get a castle type coin it's because it the blank wasn't lined up properly for the stamping mechanism.

And an upset is when the stamp was put in the machine by someone, and it was not lined up -- making a rotated obverse or reverse.
So this would be a quality control thing, I thought they were supposed to make sure the pics lined up and do a test stamp!

Super cool pics.
It so explains how people make clock faces up the key has 12 sides :)
does the $1 die have the same key too

Ooooo can we see pics of the coin with no collar

The coin in that link is a 30 degree upset, it's upset 1/2th of the dodecagonal planchet (12 sided). There are a number of reasons why this has happened but without more knowledge of a working press (or the RAM working presses) it's hard to say how this occured.
Possibilities:
1.The die could have been incorrectly placed into the press and for some reason the key didn't engage or was faulty.
2. The working die could have been hubbed at the wrong angle when it was made form the master die. Then the key would have been in place but the design angle wrong.
3. The master die was at the incorrect angle when it hubbed the working die.
Mistakes happen to everyone. This is what collectors like!

I'll try get a piccie of the key soon.

Here we go, you can see the key (in the top pic) on the left bottom end of the die.

Had a blonde moment (I thought the 12 sided bit was they key) its the 50c stamp part der.....

I just found this pic while searching for coin dies.
I'm guessing your pic shows a die that has no picture on it, has it been angle-grinded off or something.

If thee die is keyed, how can upset errors happen?
That would mean there needs to be an error in the die wouldnt it?

Ever used a set-screw with a hex driver? It will turn freely until locked into position on the flat point of the key. Someone forgot to tighten the key, or it got loose in operation.