Unrated 960 open seeks

When I try to start an unrated open seek for a game of 960 I keep getting a message in red stating that I must enter a correct minimum rating. Seems that I can create a standard unrated open seek, but not for Chess960.

Note that the minimum rating should be less or equal you rating 

The default rating boundaries are + or - 300 from your standard online rating. The default rating should be adjusted to our 960 rating for 960 games. So I had to manually change the lower boundary rating, something I don't have to do for a standard open seek game.

It is change automatically when you choose the 960chess option

All I needed to do was click the "random" button.