Shadow Lengths

If the sun is the only source of light on the moon, why do lots of the photos, like this one, show shadows at different angles and lengths?    Doesn't this show the use of spot lights?

You can see in this photograph that the astronaut on the right is much longer and at a different angle to the one on the left.  This isn't at all strange if you consider the slopes on the landscape.   There is a dip in the surface between the two figures.  The shadow on the right is sloping downhill, the shadow on the left uphill.

These diagrams represent what is happening in the photograph.  The angle of the sun is identical in both diagrams, yet because of the angle of the ground the shadow on the right is almost double the length of the one on the left.

You might also want to ask; if they was more than one light source because spotlights were used, then why do we not see more than one shadow on everything?   Surely this would be impossible to avoid, yet no photograph ever shows it happening.