Are they all "whatever the highest Rating is in your country" DVDs?

At the moment setting an online collection not to show Adult ALSO stops it showing the highest non-Adult rating (such as UK 18 or US 'R').
You have to set Adult titles to be viewable (which then may mean you want to put your actual Adult titles in a separate database)

Rant begins:
Not only is this 'annoying' for those who feel they must now have spearate Adult and non-Adult collections so they can be viewed online, this has the additional knock-on effect that and Adult title update will hardly ever be Voted on as nobody will have it in their online colleciton.
What I really don't understand is why it's there; it's supposedly to comply with come local obscenity laws but if the laws would get you into trouble for putting a UK 18 cover online then (practically) forcing users to turn on Adult titles allowed will surely be a lot more likely to give viewers in these localities an eyeful than if the systems was left as it was.
Rant ends

If this isn't the problem in your case the Rant still stands

     

I thought adult titles were referring to - you know - adult titles (as in porn), but evidently your rant is justified Voltaire, cos I checked the box mentioned by richie, and voila - there they were... Never even crossed my mind to check that... 

Not owning any "adult" movies (porn) I have nothing to hide (I think...    ).

Thanks for illuminating me with your wisdom guys,,,