The problem arose when I entered a Spirea into the Astilbes database, after realizing my error I requested the pic be moved from astilbes to Spirea entry, this was done by eclayne the next morning. Meanwhile, I wanted to put a Spirea pic with my shade plant entry, so I went into my computer library and found another Spirea pic, entered it into correct database and copied it to my shade plant post.
I think that's why it appeared 'magically' changed.