A little offtopic:
i updated the NXT client to 1.1.4 and checked if i received my NEM stake token. And it was right there. But in the right upper corner you have ´send nxt´ and ´send message´.
It seems that these are two separate things. Is it possible to send nxt coins with a message attached to it? (Like an invoice number).
Go to link that says My Assets, there you will find "Transfer" when you click on it you will see there is an option to add comment. I think that's what UP meant. You can put your Nem address in comment