Webform text field resize and shift upon save

Using Drupal 6.x with Zeropoint theme.
The last field on my form becomes longer and shift 1px to the right upon saving in the Arrange Fields module.
I have tried to resize it, put a width limit on it, with no avail.
Usually it's the last field on the form and only one field is affected.
See attached image, I can give access to the form, if needed.