Did you try with a different browser as suggested? Crosswords appears fine for me, so I don't think there is clear cut answer without more info from you.
That is a problem I have never had on here, Farrwest. Have you rebooted if on a pc/laptop?
I have tried to emulate the problem on mine but to no avail.
I clicked on the line and tried to delete various sections but I was just directed immediately to the categories.
Perhaps someone like Buenchico might have a suggestion, so hopefully he will see his name here when he next logs on.
Thanks all for the suggestions but still not there! However when I click on to AB and then click View All Categories. The categories are shown with a plus sign in the right hand column. There is one exception which is CROSSWORDS which is on a black strip all the way across. This must indicate something.