here is the problem.
when you add text to your image, you are making the image wider.
the code in the html page that displays the image has 'height' and 'width' attributes.
what probably happened is that whatever editor you're using put in the width of the original picture in the html.
now when you update that picture, it is calling for the original size.
you need to first identify which html page is displaying the image.
then find the image tag and take off the width and height parameters. it should look something like this:
Code:
<img src=images/someimage.jpg width=xx height=xx>
post some code if ya need more help.l