php dropping ".gif" and appending "-sca1-1000.png "

I am working on a php/mySQL page which has been working fine for a long time, suddenly something which was working is not.  The problem shows up in a lightbox "click on image for more detail".  Noimages are being shown because the path is incorrect.  The actual statement is as follows:

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<a href="images/<?php echo $row_Group1['Large_Image']; ?>" rel="lightbox" title="<?php echo $row_Group1['Name']; ?>"><img src="images/<?php echo $row_Group1['Featured_Image']; ?>" alt="<?php echo $row_Group1['Product_Code']; ?>" <?php echo $row_Group1['Display_Factor']; ?> border="0"></a>

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I am getting unexpected results from a php fetch to my db.

This   <?php echo $row_Group1['Large_Image']; ?>  is suppose to bring back this     GEN037CH_12862.gif

but it is bringing back      GEN037CH_12862-sca1-1000.png .

Why is it dropping the ".gif"  and appending  "-sca1-1000.png "