you don't have anything to force a line break after each image:
<?php do { ?>
<img src="<?php echo $row_rsIndex['FullPathImage1']; ?>" width="200" height="200" />
<?php } while ($row_rsIndex = mysql_fetch_assoc($rsIndex)); ?>
since there is no line break, the second image will show next to the first image and so on till there is not more available width, only when the available width runs out will it start a new line.
try adding a br tag after the image to force a new line for each one.