Images I've Posted Being Replaced With Other Images

There is a bit of a problem with images I've stored in albums on SmartCanucks and used as visitor messages (like for holiday messages, etc) - some have been replaced with rather random images. For example, if you take a look at my mom's wall: http://forum.smartcanucks.ca/members/pengzi-s-mom/ on Sun, Oct 9th, 2011 instead of a Thanksgiving message there is a page of a Walmart flyer and on Sun, May 8th, 2011 instead of a Mother's Day message there are some people in a pool, lol! I have no clue where these images are coming from - they are not ones from my albums.

But if you look at the url for one, it says "http://forum.smartcanucks.ca/members/jeniana-albums-mother-s-day-picture29436-happy-mothers-day-18.gif" even though that picture is most definitely not in my album. Here is the link to the picture it is supposed to be: http://forum.smartcanucks.ca/members...others-day-18/

Someone PM'd me a few days ago with the same problem (my picture on their wall had changed) and I fixed it but I guess it wasn't just a one-time bug like I thought.

Any ideas on what is causing this or how to fix it (other than manually replacing or deleting all the images)? Showing no image would even be better than showing a random one.