Hi, I use ImageGen Professional version 2.5.7.27945 on my homepage to display random teachers info

So, in xslt it picks a node(teacher) randomly,

<xsl:variable name="nodeRandom" select="ucomponents.xml:RandomNode(umbraco.library:GetXmlNodeById(1515)/*[@isDoc])" />

then, imagegen frame and show the photo :

<img src="/ImageGen.ashx?image=/AP/albums-photos/teachers/{$photo}&amp;overlayimage=/AP/albums-photos/frane.png" alt="{$firstname}"/>

and beside the teacher photo it displyas teacher info :

<img src="/ImageGen.ashx?image=/AP/albums-photos/texte.png&amp;align=left&amp;valign=center&amp;rotate=-8&amp;font=/AP/albums-photos/BROKEN15.TTF&amp;fontsize=18&amp;text={$texte}"/>

I have 115 teachers, so I tought it would create 115 photos and 115 info-images in cache. Then, it should only display cached photos...

But the cache folder for info-images keep growing and now have 300+ png files. Some of the files are only the base image, others are info-image but without rotation and others without the right font.

So, why wrong images are created? How could I fix this? Can you help me!

Thank you