Header spacing lost.

The _button is greyed out and not doing anything... Should I select the heading before clicking the _ button or on the last entry before the new header? The _button is greyed out and not doing anything
Is Fixed Order enabled or have you changed it?
If using Fixed Order, you might try to click the Restore Original Order button.
Fixed order was selected and the restore original order button has restored the spacing. Haven't had a spacing issue like that before. Thanks.