In an Ahnentafel report, if there is no spouse listed in a marriage (e.g. only the father's name is known), then the line for the spouse is omitted (which I suppose is OK, but maybe the number could still be shown with nothing after it), and the children are not displayed.

The link, below, demonstrates the problem.

Look at the last generation.

#5 is missing (there is no spouse at all in my DB). The child, Albert, should be shown, but he isn't.