Why do Facebook Likes disappear?

On one gallery I saw 28 Likes for the Social media content block for Facebook.
Suddenly it has 3.
What might cause this?
The gallery: http://www.joinrats.com/EarningTrust/Transportbox/i-3JpGvsk
Suddenly it has 3.
What might cause this?
The gallery: http://www.joinrats.com/EarningTrust/Transportbox/i-3JpGvsk
0
Comments
When you look at the entire gallery there are more Likes showing,
http://www.joinrats.com/EarningTrust/Transportbox/
The three Likes are for this one file,
http://www.joinrats.com/EarningTrust/Transportbox/i-3JpGvsk/A
If you need anything else, please let us know.
Take care,
Wendee
SmugMug Support Hero
http://help.smugmug.com/